All species
1644 species. Names are the accepted scientific names.
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A
- Abeliophyllum distichumKorean Abelialeaf · White Forsythia
- Abies albaEuropean Silver Fir · Silver Fir · Christmastree
- Abies amabilisBeautiful Silver-fir · Cascade Fir · Lovley Fir
- Abies borisii-regisBulgarian Fir
- Abies cephalonicaGrecian Fir · Greek Fir
- Abies cilicicaCicilian Fir · Cilician Fir · Syrian Fir
- Abies fabriFaber's Fir
- Abies firmaJapanese Fir · Momi Fir
- Abies holophyllaManchurian Fir · Needle Fir
- Abies koreanaKorean Fir
- Abies nordmannianaCaucasian Fir · Crimean Fir · Kazazdagi Fir
- Abies pindrowPindrow Fir · West Himalayan Fir
- Abies recurvataMin Fir
- Abies religiosaOyamel Fir · Sacred Fir
- Abies veitchiiChristmastree · Veitch Fir · Veitch's Silver-fir
- Abronia fragransSnowball Sand Verbena · Sweet Sand Verbena · Fragrant White Sand Verbena · Prairie Snowball
- Abronia villosaDesert Sand Verbena · Hairy Sand Verbena
- Abutilon theophrastiVelvetleaf · Buttonweed · Abutilon-hemp · American-jute · Butterprint
- Acacia iteaphyllaFlinders Ranges Wattle
- Acacia salignaCoojong · Golden Wreath Wattle · Orange Wattle · Willow Wattle · Port Jackson Willow
- Acaena inermisSpineless Acaena · Mountain Bidibid
- Acaena saccaticupulaBlue Goose Leaf
- Acanthus hungaricusHungarian Bear's-breeches · Long-leaved Bear's-breeches
- Acanthus mollisBear's Breech · Bear's Breeches · Sea-holly
- Acer buergerianumChinese Maple · Taiwan Trident Maple · Trident Maple
- Acer platanoidesNorway Maple · Plane
- Acer pseudosieboldianumKeijo Maple · Korean Maple
- Acer saccharumHard Maple · Rock Maple · Sugar Maple
- Acer tataricumAmur Maple · Tartar Maple · Tatar Maple · Tatarian Maple
- Achillea millefoliumBloodwort · Carpenter's Weed · Common Yarrow
- Achlys triphyllaAchlys · Deer's Foot · Deervetch Vanillaleaf · Sweet After Death
- Aciphylla aureaGolden Spaniard · Golden Speargrass
- Aciphylla dobsoniiDobson's Speargrass
- Aciphylla hectori
- Ackama rosifoliaMakamaka
- Aconitum heterophyllumHeteroleaf Monkshood · Atis
- Actaea erythrocarpaRed Baneberry
- Actaea pachypodaWhite Baneberry · Baneberry · Doll's-eyes
- Actaea racemosaBlack Baneberry · Black Cohosh · Black Snakeroot
- Actaea rubraRed Baneberry · Chinaberry · Baneberry · Snakeberry
- Actaea spicataBaneberry · Herb Christopher · Eurasian Baneberry
- Actinidia chinensisChinese Gooseberry · Chinese Soft-hair Kiwi · Golden Kiwi
- Adelinia grandeGrand Hound's Tongue
- Adenium obesumDesert Rose · Impala Lily · Mock Azalea · Desert-rose
- Adenophora farreriCommon Ladybells
- Adenophora liliifoliaLily-leaf Ladybell · Lilyleaf Ladybells
- Adenophora pereskiifoliaManchurian Ladybell · Serrate Ladybell
- Adenophora potaniniiBush Ladybells
- Adenophora tashiroiJejudo Ladybell
- Adenophora triphyllaThree-leaf Ladybell · Whorled-leaf Ladybell · Giant-bellflower
- Adenostoma fasciculatumChamise
- Adlumia fungosaAllegheny Vine · Canary Vine · Climbing Fumitory
- Adonis vernalisFalse Hellebore · Spring Adonis · Spring Pheasant's Eye
- Aeonium simsiiSims' Aeonium
- Aesculus hippocastanumConker-tree · European Horse Chestnut · Horse Chestnut
- Aesculus paviaRed Buckeye · Firecracker Plant · Red Horse-chestnut
- Aethionema grandiflorumPersian Candytuft · Persian Stonecress
- Agalinis setaceaThreadleaf False Foxglove
- Agapanthus africanusAfrican Lily · Agapanthus · Blue Lily · Lily of the Nile
- Agastache foeniculumBlue Giant Hyssop · Lavender Hyssop · Anise Hyssop
- Agastache nepetoidesCatnip Giant Hyssop · Yellow Giant Hyssop
- Agastache occidentalisWestern Giant Hyssop
- Agastache urticifoliaHorse Mint · Nettleleaf Giant-hyssop · Horsemint Giant Hyssop · Nettleleaf Giant Hyssop
- Agave virginicaFalse Aloe · Eastern Agave · Rattlesnake Master · Virginia Agave
- Agrimonia eupatoriaAgrimony · Churchsteeples · European Agrimony
- Agrostemma githagoCommon Corncockle · Corncockle · Purple Cockle
- Aichryson divaricatum
- Ajania gracilis
- Ajania tibeticaTibetan Tansy
- Ajuga chamaepitysGround Pine · Yellow Bugle · Ground-pine Bugle
- Alangium platanifoliumPalmate-leaf Alangium · Planeleaf Alangium
- Albuca aureaGolden Tamarak
- Albuca canadensisGambry · Soldier-in-the-box · Soldier-in-a-box
- Alcea ficifoliaAntwerp Hollyhock
- Alchemilla alpinaAlpine Lady's-mantle · Mountain Lady's-mantle
- Alchemilla faeroensisFaroese Lady's-mantle · Icelandic Lady's-mantle
- Alchemilla mollisGarden Lady's-mantle · Lady's Mantle · Soft Lady's-mantle · Lady's-mantle
- Alchemilla saxatilisRock Lady's Mantle
- Alchemilla vulgarisLady's Mantle
- Alectryon oleifoliusBoonaree · Inland Rosewood · Bullock Bush · Cattle Bush
- Aletris farinosaAgueroot · Colicroot · Crow-corn
- Aliciella formosaAztec Gilia
- Alisma plantago-aquaticaCommon Water-plantain · European Water-plantain · Mad-dog Weed
- Allardia glabraSmooth Ground Daisy
- Allardia stoliczkae
- Allardia tomentosaWhite-leaf Ground Daisy
- Allium cirrhosumKeeled Garlic
- Allium cristophiiPersian Onion · Star of Persia
- Allium falcifoliumSickle-leaf Onion · Scytheleaf Onion
- Allium gooddingiiGoodding's Onion
- Allium karatavienseTurkestan Onion · Turkistan Onion
- Allium molyLily Leek · Yellow Garlic · Yellow Onion
- Allium neapolitanumOrnamental Onion · Cottonball Flowering Onion · Naples Garlic · Naples Onion · Neapolitan Garlic · White Garlic
- Allium schubertiiTumbleweed Onion
- Allium siculumHoney Garlic · Honeybells
- Allium tricoccumWild Garlic · Ramp · Small White Leek
- Allium unifoliumAmerican Garlic · American Onion · One-leaf Onion · Oneleaf Onion
- Alnus glutinosaAlder · Black Alder · Black Elder · European Alder
- Alnus hirsutaManchurian Alder · Siberian Alder
- Alnus incana subsp. rugosaSpeckled Alder · Tag Alder
- Alnus serrulataBrook-side Alder · Common Alder · Hazel Alder
- Alonsoa linearisNarrow-leaved Mask Flower · Narrowleaf Mask Flower
- Alonsoa meridionalisCut-leaf Maskflower · Maskflower
- Alophia drummondiiPinewoods Lily · Propeller Flower · Purple Pleatleaf
- Alstroemeria aureaPeruvian Lily · Yellow Alstroemeria · Peruvian-lily
- Alstroemeria garaventae
- Alstroemeria umbellataPink Mountain Lily
- Alyssoides utriculataBladderpod · Greek Bladderpod
- Alyssum saxatileGolden Alyssum · Gold-dust
- Amelanchier laevisAllegheny Serviceberry · Smooth Shadbush · Smooth Chuckleypear
- Amelanchier stoloniferaDwarf Serviceberry · Dwarf Shadbush · Running Serviceberry
- Amsonia jonesiiJones' Bluestar
- Amsonia tabernaemontanaTexas-star · Bluestar · Eastern Bluestar
- Amsonia tomentosaWoolly Amosonia · Woolly Bluestar
- Anchusa azureaGarden Anchusa · Italian Alkanet · Italian Bugloss
- Anchusa leptophylla subsp. incanaWhitish Bugloss · Slender-leaved Bugloss
- Anchusa officinalisAlkanet · Common Bugloss · True Alkanet
- Androsace chamaejasmeSweetflower Rockjasmine · Sweet-flowered Fairy-candelabra · Sweet-flowered Rock-jasmine
- Androsace lacteaMilkwhite Rock Jasmine
- Androsace laggeriPink Rock-jasmine
- Androsace lanuginosaWoolly Rock Jasmine
- Androsace mucronifoliaSmall-leaf Rock Jasmine
- Androsace muscoideaMossy Rock Jasmine · Mossy Rock-jasmine
- Androsace nivalisSnow Dwarf Primrose
- Androsace obtusifoliaObtuse-leaved Rock-jasmine
- Androsace sarmentosaSilky Rock Jasmine
- Androsace septentrionalisNorthern Rockjasmine · Hairy Northern Fairy-candelabra · Northern Androsace · Pygmyflower Rockjasmine
- Androsace sericeaSilky Rock Jasmine
- Androsace spinuliferaRock Jasmine
- Androsace villosaRobust Rock Jasmine
- Androstephium breviflorumFunnel Lily · Pink Funnel Lily · Small-flowered Androstephium
- Androstoma empetrifoliaBog Mingimingi
- Anemonastrum baicalenseGlabrous Baikal Anemone · Baikal Anemone
- Anemonastrum demissumFloppy Himalayan Anemone
- Anemonastrum fasciculatumClustered Anemone
- Anemonastrum protractumElongated Anemone
- Anemonastrum tetrasepalumFour Petal Anemone
- Anemone cylindricaCylindrical Thimbleweed · Candle Anemone · Long-fruited Anemone
- Anemone lesseriAnemone · Windflower
- Anemone multifidaCutleaf Anemone · Pacific Anemone · Bird's-foot Anemone
- Anemone nemorosaEuropean Thimbleweed · European Wood Anemone · Wood Anemone
- Anemone ranunculoidesYellow Anemone · Yellow Woodland Anemone · Yellow Woodland Thimbleweed
- Anemonopsis macrophyllaFalse Anemone
- Anethum graveolensDill · Garden Dill
- Angelica archangelicaGarden Angelica · Norwegian Angelica · Angelica
- Angelica gigasGigantic Angelica · Korean Angelica · Korean Tanggwi
- Angelica grayiGray's Angelica
- Anigozanthos flavidusEvergreen Kangaroo-paw · Tall Kangaroo Paw · Yellow Kangaroo Paw
- Anigozanthos manglesiiMangles's Kangaroo-paw
- Anisodontea capensisAfrican Mallow · Cape African-queen · Cape Mallow
- Anisodontea scabrosaHairy Mallow · Pink Mallow · Roughleaf African Mallow
- Anisotome aromaticaKopoti
- Anisotome haastiiHaast's Carrot
- Anthericum liliagoSt. Bernard's Lily
- Anthriscus cerefoliumGarden Chervil · Salad Chervil · Chervil
- Anticlea elegansMountain Death Camas
- Anticlea occidentalisBronze-bells · Mountain-bells · Western Feather-bells
- Apium graveolensWild Celery · Celery
- Aquilegia elegantulaShooting-star Columbine · Western Red Columbine
- Aquilegia eximiaSerpentine Columbine · Van Houtte's Columbine
- Aquilegia flabellataFan Columbine
- Aquilegia formosaSitka Columbine · Crimson Columbine · Scarlet Columbine · Western Columbine
- Aquilegia fragransFragrant Columbine · Sweet-scented Columbine
- Aquilegia laramiensisLaramie Columbine
- Aquilegia olympicaOlympic Columbine · Caucasian Columbine
- Aquilegia saximontanaRocky Mountain Blue Columbine
- Aquilegia scopulorumUtah Columbine · Blue Columbine · Rock Columbine
- Aquilegia skinneriSkinner's Columbine
- Aralia californicaCalifornia Spikenard · California-ginseng · Elk Clover
- Aralia elataJapanese Angelica Tree · Japanese Aralia · Korean Angelica Tree
- Aralia racemosaAmerican Spikenard · Indianroot · Life-of-man
- Arbutus menziesiiArbutus · Arbutus Tree · Laurelwood · Pacific Madrone
- Arctomecon californicumLas Vegas Bearpoppy · California Bearpoppy · Golden Bearpoppy
- Arctostaphylos columbianaColumbia Manzanita · Bristly Bearberry · Bristly Manzanita · Hairy Manzanita
- Arctostaphylos crustaceaBrittleleaf Manzanita
- Arctostaphylos nevadensisPinemat Manzanita · Snowmat Manzanita
- Arctostaphylos patulaGreen-leaf Manzanita · Greenleaf Manzanita
- Arctostaphylos pungensMexican Manzanita · Point-leaf Manzanita · Pointleaf Manzanita
- Arctostaphylos uva-ursiBear-grape · Bearberry · Bearberry Manzanita · Kinnikinnick
- Arenaria norvegicaNorwegian Sandwort
- Arenaria tmoleaHonaz Sandwort
- Argemone grandifloraWhite Mexican Poppy · White Large-flowered Prickly-poppy
- Argemone hispidaRough Pricklypoppy
- Argemone munitaChicalote · Flat-bud Prickly Poppy · Fried Egg Plant · Flatbud Pricklypoppy
- Argemone pleiacanthaSouthwestern Prickly Poppy · Southwestern Pricklypoppy
- Argylia adscendensTriaca
- Argyreia nervosaElephant Creeper · Hawaiian Baby Woodrose · Baby Wood-rose
- Arisaema consanguineumHimalayan Cobra Lily
- Arisaema dracontiumDragon Arum · Dragon-root · Green Dragon
- Arisaema flavumYellow Cobra Lily
- Arisaema nepenthoidesPitcher Cobra Lily · Himalayan Cobra Lily
- Arisaema thunbergiiAsian Jack-in-the-pulpit
- Arisaema tortuosumArisaema
- Arisaema triphyllumIndian-turnip · Jack in the Pulpit · Indian Jack-in-the-pulpit
- Aristolochia serpentariaVirginia Snakeroot
- Armeria maritimaThrift · Marsh Daisy · Sea Cushion · Thrift Seapink
- Aronia melanocarpaBlack Chokeberry · Black Chokecherry
- Artemisia dracunculusFrench Tarragon · Russian Tarragon · Tarragon
- Arthropodium cirrhatumRock-lily
- Arum concinnatumElaborated Arum
- Arum cyrenaicumLibyan Arum
- Arum dioscoridisDioscorides Arum
- Arum italicumItalian Arum · Italian Cuckoo-pint · Large Cuckoo Pint · Italian Lords and Ladies
- Arum maculatumCuckoo Pint · Jack-in-the-pulpit · Wake Robin
- Arum nigrumBlack Arum
- Asarina procumbensCreeping Snapdragon · Snapdragon Vine · Trailing Snapdragon
- Asarum canadenseAmerican Wild Ginger · Canada Snakeroot · Canada Wild Ginger · Canadian Wildginger
- Asarum europaeumAsarabacca · European Wild Ginger · Hazelwort
- Asclepias cryptocerasDavis' Milkweed · Humboldt Mountains Milkweed · Humboldt Milkweed · Pallid Milkweed
- Asclepias exaltataPoke Milkweed · Tall Milkweed
- Asclepias incarnataPleurisy Root · Swamp Milkweed
- Asclepias quadrifoliaFour-leaf Milkweed · Four-leaved Milkweed · Whorled Milkweed · Fourleaf Milkweed
- Asclepias syriacaCommon Milkweed · Butterfly Flower · Silkweed · Silky Swallow-wort
- Asclepias tuberosaButterfly Milkweed · Butterfly-weed · Canada Root
- Asimina trilobaAmerican Paw Paw · Dog-banana · Indian-banana · Pawpaw
- Asperula arvensisBlue Woodruff · Field Woodruff
- Asperula orientalisAnnual Woodruff · Oriental Asperula
- Asperula tinctoriaDyer's Woodruff
- Asphodeline brevicaulisJacob's Rod
- Asphodeline liburnicaJacob's Rod
- Asphodeline luteaJacob's-rod · Yellow Asphodel · Yellow King's-spear
- Asphodelus aestivusSummer Asphodel
- Asphodelus albusWhite Asphodel · Gamón-blanco
- Asphodelus cerasiferBranching Asphodel
- Asphodelus fistulosusAsphodel · Hollow-stemmed Asphodel · Onion-leafed Asphodel · Onionweed
- Asphodelus ramosusBranched Asphodel · Silverrod
- Aster alpinusAlpine Aster · Blue Alpine Daisy
- Astragalus whitneyiBalloonpod Milkvetch · Whitney's Milkvetch · Balloon Milk-vetch
- Astrantia carniolicaCarnic Masterwort
- Astrantia majorAstrantia · Greater Masterwort · Mountain Sanicle · Great Masterwort · Masterwort
- Astrantia minorLesser Masterwort
- Asyneuma limonifoliumSouthern Rampion
- Atadinus fallaxBuckthorn
- Athamanta turbithCandy Carrot
- Atriplex canescensFourwing Saltbush · Nuttall's Saltbush · Chamiso
- Atriplex longipesLong-stalked Orache
- Aucuba japonicaJapanese Acuba · Japanese Aucuba · Japanese Laurel
- Aureolaria virginicaDowny Yellow False Foxglove · Virginia Oak-leech · Downy False Foxglove
- Averrhoa carambolaCarambola · Starfruit · Blimbing
B
- Babiana tubulosaGranite Trumpet Bobbejaantjie
- Baeometra unifloraBeetle Lily
- Ballota pseudodictamnusFalse Dittany · False Divinity · Greek Horehound
- Balsamorhiza hookeriHairy Balsamroot · Hooker's Balsamroot · Cutleaf Balsamroot
- Balsamorhiza sagittataArrowleaf Balsamroot · Arrow-leaved Balsamroot
- Bambusa bambosGiant Thorny Bamboo · Indian Thorny Bamboo · Spiny Bamboo
- Banksia formosaShowy Dryandra
- Banksia serraSerrate-leaved Dryandra
- Baptisia australisBaptisia · Blue False Indigo · Blue Wild Indigo
- Barbarea vulgarisBittercress · Common Winter-cress · Cressy-greens · Garden Yellowrocket
- Barnardia japonicaEast Asian Squill
- Begonia grandisHardy Begonia
- Begonia pictaPainted Leaf Begonia
- Bellevalia romanaRoman Squill
- Berardia lanuginosaBérard's Thistle · Woolly Berardia
- Berberis heteropodaBarberry
- Berberis japonicaJapanese Ashberry · Japanese Mahonia · Oregon Grape
- Berberis julianaeBerberis Lempergiana · Chinese Barberry · Great Barberry · Wintergreen Barberry
- Berlandiera lyrataChocolate Daisy · Chocolate-flower · Lyre-leaf Greeneyes · Lyreleaf Greeneyes
- Berzelia galpiniiLangeberg Kolkol · Riversdale Kolkol
- Berzelia lanuginosaCommon Buttonbush · Marsh Buttonbush · Vlei Kolkol
- Berzelia rubraCobweb Kolkol
- Beschorneria yuccoidesMexican Lily · Amole
- Betonica macranthaBig Betony · Big-sage · Bishop's Wort
- Betula nanaArctic Dwarf Birch · Dwarf Birch · Alpine Birch
- Betula pendulaCommon Birch · East Asian White Birch · European White Birch
- Betula populifoliaFire Birch · Gray Birch · White Birch
- Betula pubescensBrown Birch · Downy Birch · European Paper Birch
- Billardiera longifloraMountain Blue Berry · Purple Apple-berry
- Biscutella coronopifoliaCoronopus-leaved Buckler Mustard
- Blephilia hirsutaHairy Blephilia · Hairy Pagoda Plant · Hairy Wood Mint · Hairy Pagoda-plant
- Blitum virgatumStrawberry Goosefoot · Leafy Goosefoot
- Bloomeria croceaCommon Goldenstar · Goldenstar
- Boenninghausenia albifloraWhite Himalayan Rue
- Bolboschoenus caldwelliiCaldwell's Clubrush · Sea Club-rush
- Bolboschoenus fluviatilisRiver Bulrush
- Boykinia aconitifoliaAllegheny Brookfoam · Brook Saxifrage
- Brachyglottis lagopusDwarf Alpine Senecio
- Braya alpinaAlpine Braya · Northern Rockcress
- Brimeura amethystinaPyrenean Bluebell
- Broussonetia papyriferaAute · Paper Mulberry · Tapa Cloth Tree
- Brugmansia suaveolensAngel's Tears · Angel's-trumpet · White Angel's-trumpet · Angel's-tears
- Bulbine annuaAnnual Bulbine
- Bulbine bulbosaBulbine Lily · Golden-lily · Small Onionweed
- Bulbine frutescensBulbinella · Snake Flower · Wild Beardstyle · Wild Kopieva
- Bupleurum longifoliumLong-leaved Hare's-ear
- Bupleurum ranunculoidesCrowfoot-leaved Hare's-ear
- Bupleurum rotundifoliumHare's Ear · Thorow-wax · Round-leaved Thoroughwax
- Bupleurum spinosumSpiny Hare's-ear
- Butomus umbellatusFlowering Rush · Grassy-rush · Greater Flowering-rush
C
- Caiophora coronataOrtiguilla
- Caiophora lateritiaBrick-red Caiophora · Chile Nettle · Red-flowered Loasa
- Calandrinia caespitosa
- Calandrinia umbellataRock Purslane
- Callicarpa dichotomaPurple Beauty-berry · Purple Beautyberry
- Callitris canescensMorrison's Cypress Pine · Scrubby Cypress Pine
- Calluna vulgarisCommon Heather · Heather · Ling
- Calochortus aureusGolden Mariposa Lily
- Calochortus kennedyiDesert Mariposa Lily
- Caltha bifloraHowell's Marigold · Two-flower Marsh-marigold · Broad-leaved Marsh Marigold
- Caltha leptosepalaSlender-sepal Marsh-marigold · Elkslip · Elkslip Marsh Marigold · White Marsh Marigold
- Calycanthus floridusCarolina Allspice · Carolina Sweetshrub · Eastern Sweetshrub
- Calycocarpum lyoniiCup-seed · Cupseed
- Calydorea amabilis
- Calydorea nuda
- Calydorea pallens
- Calydorea xiphioidesTahay
- Calyptridium monospermumOne-seeded Pussypaws
- Calyptridium umbellatumMount Hood Pussypaws · Mount Hood Umbellate Pussypaws · Mt. Hood Pussy-paws
- Camassia leichtliniiLeichtlin's Camas · Great Camas · Large Camas
- Camissoniopsis cheiranthifoliaBeach Evening Primrose
- Campanula alliariifoliaCornish Bellflower
- Campanula carpaticaCarpathian Bellflower · Carpathian Harebell · Tussock Bellflower
- Campanula coriaceaCevaz Bellflower
- Campanula dasyanthaHairyflower Bellflower
- Campanula glomerataClustered Bellflower · Dane's Blood
- Campanula grandisGreat Bellflower
- Campanula hofmanniiRinged Bellflower · Hofmann's Ringed Bellflower
- Campanula incurvaEvia Bellflower
- Campanula latifoliaGiant Bellflower · Great Bellflower · Greater Bellflower
- Campanula lyrataLyre-leaved Bellflower
- Campanula mediumCanterbury Bellflower · Canterbury Bells · Canterbury-bell
- Campanula pallidaHimalayan Bellflower · Purple Bellflower
- Campanula persicifoliaNarrow-leaved Bellflower · Peach-leaved Bellflower · Peachleaf Bellflower
- Campanula punctataSpotted Bellflower
- Campanula pyramidalisChimney Bellflower
- Campanula rapunculoidesCreeping Bellflower · Rampion Bellflower
- Campanula rotundifoliaBluebell Bellflower · Common Harebell · Harebell
- Campanula scabrellaDowny Alpine Bellflower · Rough Bellflower · Rough Harebell
- Campanula shetleriCastle Crag Harebell · Castle Crags Bellflower · Castle Crags Harebell
- Campanula sibiricaSiberian Bellflower
- Campanula spicataSpiked Bellflower
- Campanula vidaliiAzores Bellflower
- Cannabis sativaHashish · Hemp · Marijuana
- Capnoides sempervirensHarlequin Flower · Pale Corydalis · Pink Corydalis
- Capparis spinosaCaper · Flinders-rose · Caperbush
- Capsicum annuumBell Pepper · Bird Pepper · Cayenne Pepper
- Capsicum frutescensAfrican Chilli · African Pepper · Bird Pepper
- Cardamine concatenataCut-leaf Toothcup · Cut-leaved Toothwort · Five-part Toothwort · Cutleaf Toothwort
- Cardamine pensylvanicaPennsylvania Bittercress
- Cardiocrinum cordatumHeart-leaved Lily · Lily
- Cardiocrinum giganteumGiant Himalayan Lily
- Cardiospermum halicacabumBalloon Vine · Black Winter Cherry · Love-in-a-puff
- Carex arenariaGerman-sarsaparilla · Sand Sedge
- Carex comansNew Zealand Hair Sedge
- Carex grayiAsa Gray's Sedge · Gray's Sedge · Gray's Bur Sedge
- Carex luridaShallow Sedge · Bottlebrush Sedge · Sallow Sedge
- Carex muskingumensisMuskingum Sedge · Palm Sedge · Swamp Oval Sedge
- Carex puniceaFrost Flat Hook Grass · Red Bastard Grass
- Carex retrorsaDeflexed Bottlebrush Sedge · Knot-sheath Sedge · Long-bracted Sedge · Knotsheath Sedge
- Carex strictaUpright Sedge · Uptight Sedge · Common Tussock Sedge
- Carica papayaPapaw · Papaya · Pape
- Carthamus tinctoriusDyer's-saffron · False Saffron · Safflower
- Cassiope fastigiataHimalayan Heather
- Castilleja miniataCommon Paintbrush · Common Red Paintbrush · Giant Red Indian Paintbrush
- Castilleja parvifloraMountain Indian Paintbrush · Mountain Paintbrush · Rosy Paintbrush
- Catalpa bignonioidesAmerican Catalpa · Caterpillar Tree · Indian Bean Tree · Southern Catalpa
- Cathcartia betonicifoliaHimalayan Blue Poppy
- Cautleya spicataSpiked Shade Ginger · Hardy Shade Ginger · Chinese Butterfly Ginger
- Ceanothus americanusJersey Tea · Jersey-tea Ceanothus · New Jersey Tea
- Cedrus atlanticaAtlantic Cedar · Atlas Cedar
- Celtis tenuifoliaDwarf Hackberry
- Centaurium scilloidesPerennial Centaury
- Cephalanthus occidentalisButton-willow · Buttonbush · Common Buttonbush
- Cerastium fontanumCommon Chickweed · Common Mouse-ear · Common Mouse-ear Chickweed
- Cercocarpus betuloidesBirch-leaf Mahogany · California Mountain Mahogany · Mountain Mahogany
- Cercocarpus intricatusLittle-leaf Mountain Mahogany · Littleleaf Mountain Mahogany
- Cerinthe majorGreater Honeywort · Blue Shrimp Plant · Great Honeywort · Honeywort
- Cestrum nocturnumNight Jessamine · Night-blooming Cestrum · Lady-of-the-night
- Chaenomeles japonicaJapanese Quince · Maule's Quince · Japanese Flowering Quince
- Chaloupkaea aizoonJuicy Rock Navel
- Chamaebuxus paucifoliaGaywings · Fringed Polygala
- Chamaechaenactis scaposaFullstem
- Chasmanthe floribundaAfrican Cornflag · African Flag · Aunt Eliza
- Chelidonium majusCelandine · Great Celandine · Greater Celandine
- Cherleria bifloraMountain Sandwort · Mountain Stitchwort
- Cherleria laricifoliaLarch-leaf Sandwort
- Chiastophyllum oppositifoliumLamb's-tail · Gold Drop
- Chilopsis linearisDesert Willow
- Chionanthus virginicusAmerican Fringetree · Fringetree · Grancy Gray Beard · White Fringetree
- Chrysojasminum humileItalian Jasmine · Yellow Jasmine · Italian Yellow Jasmine
- Cicer arietinumBengal Gram · Chick Pea · Garbanzo
- Cistanthe grandifloraDoquilla · Hierba del Corrimiento · Mármol · Pata de Guanaco · Renilla
- Cistus laurifoliusLaurel-leaved Cistus · Laurel-leaf Cistus
- Citrullus lanatusAfghan-melon · Water Melon · Bastard-melon · Watermelon
- Citrus trifoliataChinese Bitter Orange · Japanese Bitter-orange · Trifoliate-leaved Orange
- Clematicissus striataMiniature Grape Ivy
- Clematis addisoniiAddison Brown's Clematis · Addison Brown's Leather-flower · Addison's Leatherflower · Addison's Leather Flower
- Clematis albicomaErect Mountain Clematis · White-haired Leather-flower · Whitehair Leather Flower
- Clematis alpinaAlpine Clematis · Alpine Virginsbower · Siberian Clematis
- Clematis coactilisErect Silky Leather-flower · Virginia White-hair Leather-flower · Curly-heads · Virginia Whitehair Leather Flower
- Clematis columbianaBlue Clematis · Rock Clematis
- Clematis connataHimalayan Clematis
- Clematis crispaSwamp Leather Flower · Blue-jasmine · Curly Clematis
- Clematis forsteriForster's Clematis
- Clematis grataCharming Clematis
- Clematis hirsutissimaHairy Clematis · Sugar Bowls
- Clematis integrifoliaSolitary Clematis
- Clematis lanuginosaWoolly Clematis
- Clematis occidentalisNorthern Blue Clematis · Purple Clematis · Purple Virgin's-bower · Western Blue Virginsbower
- Clematis orientalisChinese Clematis · Orange-peel Clematis · Oriental Virginsbower
- Clematis tibetanaOriental Clematis
- Clematis viornaVase-vine Leatherflower · Leather-flower · Leather-flower Vine · Vasevine
- Clematis virginianaVirginia Bower · Virginia Clematis · Virginia Virgin's-bower · Devil's Darning Needles
- Clethra alnifoliaCoastal Sweet Pepperbush · Pink-spire · Summersweet · Coastal Sweetpepperbush
- Clethra fargesiiFarges Clethra
- Clinopodium albumThyme-leaved Calamint
- Clinopodium alpinumRock Thyme
- Clintonia andrewsianaAndrew's Clintonia · Red Clintonia · Western Bluebead Lily
- Clintonia umbellulataSpeckled Wood-lily · Speckle Wood-lily · White Clintonia
- Cneorum tricocconSpurge Olive
- Cobaea scandensCathedral Bells · Mexican-ivy · Monastery-bells
- Cochlearia officinalisCommon Scurvygrass · Scurvy-grass · Spoonwort
- Codonopsis clematideaBonnet-bellflower
- Colchicum autumnaleAutumn Crocus · Meadow Saffron · Naked Ladies
- Colchicum bulbocodiumSpring Meadow Saffron
- Colchicum luteumIndian Colchicum
- Coleus fredericii
- Collomia bifloraScarlet Collomia
- Collomia grandifloraCalifornia Strawflower · Grand Collomia · Large-flower Collomia
- Conanthera bifoliaTwo-leaved Conanthera
- Conimitella williamsiiWilliam's Conimitella · Williams' Miterwort · Williams' Mitrewort
- Coprosma acerosaSand Coprosma
- Coprosma atropurpurea
- Coprosma rhamnoidesTwiggy Coprosma
- Cordyline pumilioStemless Cabbage Tree · Dwarf Cabbage Tree
- Coreopsis lanceolataGarden Coreopsis · Lance-leaf Tickseed · Lance-leaved Coreopsis · Lanceleaf Tickseed
- Coriaria terminalis
- Cornus alternifoliaAlternate-leaf Dogwood · Green Osier · Pagoda Dogwood · Alternateleaf Dogwood
- Cornus canadensisBunchberry Dogwood · Canada Bunchberry · Canadian Bunchberry
- Cornus floridaAmerican Boxwood · Arrowwood · Dogwood · Flowering Dogwood
- Cornus kousaChinese Dogwood · Japanese Dogwood · Korean Dogwood · Kousa Dogwood
- Cornus masCornejo Macho · Cornelian Cherry · Cornelian Cherry Dogwood
- Cornus nuttalliiNuttall's Dogwood · Mountain Dogwood · Western Flowering Dogwood · Pacific Dogwood
- Cornus racemosaGray Dogwood · Northern Swamp Dogwood
- Corydalis caseanaSierra Fumewort · Fitweed
- Corydalis cheilanthifoliaFern-leaved Corydalis · Fern-leaf Corydalis
- Corydalis nobilisNoble Corydalis · Siberian Corydalis
- Corylopsis paucifloraButtercup Winterhazel
- Corylopsis spicataSpike Winter Hazel
- Corylus avellanaBarcelona-nuts · Cobnut · Common Filbert
- Cosmos bipinnatusCommon Cosmos · Garden Cosmos · Mexican Aster
- Costus guanaiensisCana de India
- Cotoneaster dammeriBearberry Cotoneaster
- Cotoneaster divaricatusSpreading Cotoneaster · Stretch-fruit Cotoneaster
- Cotoneaster horizontalisPurple-flowered Cotoneaster · Rockspray · Rockspray Cotoneaster
- Cotoneaster microphyllusSmall-leaved Cotoneaster · Small-leaf Cotoneaster
- Cotyledon orbiculataPig Ears · Pig's Ear · Cotyledon
- Crambe cordifoliaGreater Sea-kale · Colewort
- Craspedia incana
- Crataegus monogynaEnglish Hawthorn · Hawthorn · Neapolitan Medlar · Oneseed Hawthorn
- Crataegus phaenopyrumWashington Hawthorn
- Cratoxylum cochinchinenseRed Memphat · Yellow Cow Wood
- Cremanthodium ellisiiHimalayan Mini Sunflower
- Crepis sibiricaSiberian Hawksbeard
- Crocosmia aureaFalling Stars
- Crocus tommasinianusEarly Crocus · Tommasini's Crocus · Woodland Crocus
- Cruckshanksia hymenodon
- Cryptotaenia japonicaEast Asian Wildparsley · Japanese Cryptotaenia · Japanese Honewort
- Cucumis meloCantaloupe · Hami Melon · Melon
- Cucurbita maximaAtlantic Giant Pumpkin · Hokkaido Squash · Hubbard Squash · Winter Squash
- Cucurbita pepoAcorn Squash · American Pumpkin · Bitter Bottle Gourd · Field Pumpkin
- Cuphea igneaCigar · Cigar Flower · Cigar Plant
- Cyathophylla chlorifoliaTahdikotu
- Cyclamen hederifoliumIvy-leaved Cyclamen · Sowbread · Hardy Cyclamen
- Cyclamen persicumCommon Cyclamen · Cyclamen · Florist's Cyclamen
- Cymbalaria muralisIvy-leaved Toadflax · Kenilworth Creeper · Kenilworth Ivy
- Cymopterus aboriginumIndian Springparsley
- Cynanchum acutumStranglewort
- Cynoglossum amabileChinese Hound's Tongue · Chinese Hound's-toungue · Chinese Forget-me-not
- Cyperus alternifoliusUmbrella Sedge
- Cyperus papyrusEgyptian Paperplant · Papayrus · Paper Plant · Papyrus
- Cytisus decumbensProstrate Broom
D
- Daphne caucasicaCaucasian Daphne
- Daphne genkwaLilac Daphne
- Daphne mezereumFebruary Daphne · Mezereon · Paradise Plant
- Darlingtonia californicaCalifornia Pitcherplant · Cobra Lily · Calf's Head
- Darmera peltataIndian Rhubarb · Umbrella Plant
- Datura stramoniumJimsonweed · Common Thorn-apple · Jamestown Weed
- Daubenya aureaCrimson Crownlily · Gold Crownlily · Roggeveld Crownlily
- Daucus carotaCarrot · Queen Anne's Lace · Wild Carrot
- Daucus carota subsp. sativusCarrot Family · Umbellifer · Carrot
- Delphinium bicolorLittle Larkspur · Low Larkspur
- Delphinium consolidaField Larkspur · Forking Larkspur · Branching Larkspur
- Delphinium geraniifoliumClark Valley Larkspur · Mogollon Larkspur
- Delphinium geyeriGeyer's Larkspur · Plains Larkspur · Poisonweed
- Delphinium glaucumBrown's Larkspur · Hooker's Larkspur · Sierra Larkspur
- Delphinium grandiflorumSiberian Larkspur
- Delphinium oreophilumMountain-loving Larkspur
- Delphinium tenuisectumCarrotleaf Larkspur
- Delphinium tricorneDwarf Larkspur
- Delphinium xantholeucumNorthwestern Larkspur · Yellow White Larkspur
- Delphinium × barlowiiBelladonna Delphinium · Garland Larkspur
- Dendrocalamus asperAsper · Dragon Bamboo · Petung Bamboo · Giant Bamboo
- Dendrocalamus membranaceusWaya Bamboo · White Bamboo
- Dendromecon rigidaCalifornian Poppy Bush · Bush-poppy · Tree Poppy
- Desmanthus illinoensisIllinois Bundle-flower · Prairie Bundleflower · Prairie Mimosa · Illinois Bundleflower
- Dianella intermediaTurutu
- Dianthus carthusianorumCarthusian Pink · Clusterhead · Charterhouse Pink
- Dianthus gratianopolitanusCheddar Pink
- Dianthus spiculifoliusRed Eye Pink
- Dianthus superbusIntermediate Fringed Pink · Large Pink · Fringed Pink
- Dicentra cucullariaDutchman's Breeches · Dutchman's Britches · Ear Drops
- Dicentra eximiaFringed Bleeding Heart · Turkey-corn · Wild Bleeding Heart · Turkey Corn
- Dicentra unifloraLonghorn Steer's-head · One-flowered Bleeding-heart · Steer's Head
- Dichelostemma multiflorumMany-flower Brodiaea · Round-tooth Snake-lily · Round-tooth Ookow · Roundtooth Snakelily
- Dictamnus albusGas Plant · Burning Bush · Dittany · Fraxinella
- Dieteria bigeloviiBigelow's Tansyaster · Sticky Aster
- Dietes grandifloraAfrican Iris · Butterfly Iris · Fairy Iris · Wild Iris
- Digitalis canariensisCanary Island Foxglove · Canary Islands Foxglove
- Digitalis grandifloraYellow Foxglove · Large Yellow Foxglove
- Digitalis luteaStraw Foxglove · Small Yellow Foxglove
- Digitalis viridifloraGreen-flowered Foxglove
- Dioscorea communisBlack Bryony · Black Bindweed
- Dioscorea quaternataFourleaf Yam · Four-leaved Yam
- Dioscorea villosaChinaroot · Yellow Yam · Colic Root · Wild Yam
- Diospyros texanaMexican Persimmon · Texas Persimmon · Black Persimmon
- Diospyros virginianaAmerican Persimmon · Eastern Persimmon · Simmon · Common Persimmon
- Dipcadi virideDainty Green Bells · Green Daintybells
- Diplacus cusickiiCusick Monkeyflower · Cusick's Monkey-flower
- Diplacus grandiflorusLargeflower Bush Monkeyflower
- Diplarrhena moraeaButterfly Flag · White Iris
- Dipsacus fullonumCommon Teasel · Draper's Teasel · Fuller's Teasel · Wild Teasel
- Dipsacus strigosusYellowflower Teasel
- Dirca palustrisEastern Leatherwood · Leatherwood · Moosewood
- Discaria toumatouMatagouri · Wild Irishman
- Distimake tuberosusHawaiian Wood-rose · Spanish Arbour-vine · Spanish Arborvine
- Dolichandra unguis-catiCat Claw · Catclaw Vine · Cat's Claw Creeper
- Draba acaulisShort-stemmed Whitlow Grass
- Draba bruniifoliaMossy Whitlow-grass
- Draba compactaCrag Whitlow Grass
- Draba creticaWhitlow-grass
- Draba densifoliaNuttall's Draba · Dense-leaf Whitlow-grass · Dense-leaved Draba · Denseleaf Draba
- Draba doerfleri
- Draba hoppeanaHoppe's Whitlowgrass
- Draba incertaYellowstone Draba · Yellowstone Whitlow-grass
- Draba parnassicaWhitlow-grass
- Draba podolicaRussian Madwort
- Draba ventosaWind River Draba · Wind River Whitlow-grass · Windy Whitlow-grass
- Dracocephalum canescensAzure Lip
- Dracocephalum renatiMoroccan Dragonhead
- Dracocephalum tanguticumDragonhead
- Dracunculus vulgarisCommon Dracunculus · Dragon Arum · Dragon Lily
- Draperia systylaViolet Draperia
- Drosera anglicaEnglish Sundew · Great Sundew
- Drosera binataFork-leaved Sundew · Forked Sundew · Sundew
- Drosera burkeanaBurks Sundew
- Drosera capensisCape Sundew
- Drosera spathulataSpoon-leaved Sundew · Rosy Sundew
- Dryas sundermanniiMountain Avens
- Drymophila cyanocarpaNative Solomon's Seal · Turquoise Berry
- Dudleya cymosaCanyon Live-forever · Canyon Dudleya · Live-forever · Canyon Liveforever
E
- Eccremocarpus scaberChilean Glory-flower · Chilean Glory Creeper · Chilean Glory Vine
- Echeandia flavescensAmberlily · Torrey's Craglily
- Echinocereus pectinatusArizona Hedgehog Cactus · Rainbow Cactus · Spiny Hedgehog Cactus · Comb Hedgehog Cactus
- Echinocereus reichenbachiiClassen's Cactus · Lace Hedgehog Cactus · Reichenbach's Hedgehog Cactus · Lace Cactus
- Echinocereus triglochidiatusClaret-cup Hedgehog · Claret-cup Hedgehog Cactus · Claretcup Cactus · Kingcup Cactus
- Echinocereus viridiflorusGreen Pitaya · Green-flower Hedgehog Cactus · Nylon Hedgehog Cactus
- Echinocystis lobataWild Cucumber · Prickly Cucumber
- Edraianthus pumilioSilvery Dwarf Harebell
- Elliottia paniculataSpike Azalea
- Elmera racemosaElmera · Fuzzy Elmera · Yellow Coral-bells · Yellow Coralbells
- Empetrum nigrumBlack Crowberry · Blackberry · Crowberry
- Ephedra minutaJoint-pine · Ephedra
- Ephedra monospermaDwarf Joint Fir
- Epilobium anagallidifoliumAlpine Willowherb · Pimpernel Willowherb
- Epilobium canum subsp. garrettiiGarrett's California Fuchsia · Garrett's Firechalice · Hummingbird Trumpet
- Epilobium canum subsp. latifoliumHummingbird Trumpet · Hummingbird-flower
- Epilobium palustreMarsh Willow-herb · Swamp Willowherb · Marsh Willowherb
- Eranthis hyemalisChoirboys · Winter Aconite · Winter Hellebore
- Eremurus altaicusAltai Foxtail Lily
- Eremurus robustusFoxtail Lily
- Eriastrum densifoliumGiant Woollystar
- Erica spiculifoliaEastern Heath · Spike Heath
- Erigeron compositusCutleaf Daisy · Compound Fleabane · Cut-leaf Fleabane
- Erigeron elegantulusBlue Dwarf Fleabane
- Erigeron flabellifoliusFanleaf Fleabane
- Erigeron flettiiFlett's Fleabane · Olympic Daisy · Olympic Fleabane
- Erinus alpinusFairy Foxglove · Alpine Balsam · Liver Balsam
- Eriogonum alleniiShale Barren Buckwheat
- Eriogonum bicolorPretty Buckwheat · Pretty Wild Buckwheat
- Eriogonum brevicauleShortstem Buckwheat
- Eriogonum caespitosumMat Buckwheat · Mat Eriogonum · Matted Buckwheat
- Eriogonum compositumArrow-leaf Wild Buckwheat · Arrowleaf Buckwheat
- Eriogonum douglasiiDouglas' Buckwheat
- Eriogonum ericifoliumYavapai County Buckwheat · Heather-leaf Wild Buckwheat
- Eriogonum flavumAlpine Golden Buckwheat · Alpine Golden Wild Buckwheat · Yellow Buckwheat
- Eriogonum marifoliumMarum-leaf Wild Buckwheat · Marumleaf Buckwheat
- Eriogonum niveumSnow Buckwheat · Snow Wild Buckwheat
- Eriogonum ovalifoliumCushion Buckwheat · Cushion Wild Buckwheat · Oval-leaved Buckwheat
- Eriogonum shockleyiShockley Buckwheat · Shockley's Buckwheat · Shockley's Wild Buckwheat
- Eriogonum sphaerocephalumRock Buckwheat
- Eriogonum strictumBlue Mountain Buckwheat · Blue Mountain Wild Buckwheat · Strict Buckwheat
- Eriogonum tumulosumWoodside Buckwheat
- Eriolarynx australisArgentine Pear
- Eriophorum angustifoliumBog-cotton · Common Cottongrass · Common Cottonsedge · Tall Cottongrass
- Eriophyllum lanatumCommon Woolly Sunflower · Oregon Sunshine · Woolly Eriophyllum
- Eryngium yuccifoliumButton Eryngo · Button Snake-root · Rattlesnake Master
- Erysimum capitatumPrairie Rocket · Sand-dune Wallflower · Western Wallflower · Sanddune Wallflower
- Erysimum cheiriAegean Wallflower · Wallflower
- Erysimum kotschyanumKotschy Wallflower · Dwarf Wallflower
- Erythranthe lewisiiLewis' Monkeyflower · Lewis's Monkey-flower · Great Purple Monkeyflower
- Erythranthe luteaBlood-drop-emlets · Yellow Monkey-flower · Yellow Musk
- Erythranthe primuloidesPrimrose Monkeyflower
- Erythronium americanumAmberbell · American Trout Lily · Dogtooth Violet
- Erythronium grandiflorumWhite Glacierlily · Avalanche-lily · Glacier Lily · Yellow Avalanche-lily
- Erythronium hendersoniiHenderson's Fawn-lily · Henderson's Fawnlily
- Erythronium revolutumCoast Fawn Lily · Mahogany Fawn Lily · Pink Fawn Lily · Mahogany Fawnlily
- Erythronium sibiricumSiberian Fawn Lily
- Eubotrys racemosaSwamp Sweetbells · Coastal Fetterbush · Fetterbush
- Eucomis pallidifloraGiant Pineapple Lily
- Eucomis zambesiacaTropical Pineapple Lily
- Euonymus alatusBurning Bush · Burning Bush Spindletree · Spindletree · Burningbush
- Euonymus europaeusCommon Spindle · European Spindletree · European Euonymus
- Euonymus maackiiHamilton's Spindletree
- Euonymus phellomanusCorktree
- Euphorbia aristataBearded Spurge
- Euphorbia characias subsp. wulfeniiWulfen Spurge · Mediterranean Spurge
- Euphorbia epithymoidesCushion Spurge
- Euphorbia franchetiiFranchet's Spurge
- Euphorbia myrsinitesBroad-leaved Glaucous-spurge · Myrtle Spurge · Blue Spurge
- Eustoma russellianumPrairie Gentian · Showy Prairie Gentian · Lisianthus · Texas Bluebell
- Eutrochium purpureumSweet Joe Pye Weed · Sweet-scented Joe Pye Weed · Purple Joe Pye Weed
- Evotrochis verticillataPrimrose
- Exochorda racemosaCommon Pearlbrush · Common Pearlbush · Pearlbrush
F
- Fallugia paradoxaApache Plume
- Farinopsis salesovianaWhite Himalayan Cinquefoil
- Ferocactus cylindraceusCalifornia Barrel Cactus · Compass Barrel
- Ferocactus wislizeniCandy Barrelcactus · Fishhook Barrel Cactus
- Ferraria crispaBlack Flag · Black Spiderlily · Crispy Spiderlily
- Ferula communisGiant Fennel
- Fibigia clypeataRoman Shields · Silver Shield
- Ficus caricaCommon Fig · Edible Fig · Fig
- Filipendula ulmariaEuropean Meadowsweet · Meadowsweet · Queen of the Meadow · Bridewort
- Flueggea suffruticosaSuffrutescent Securinega · Arching Bushweed
- Foeniculum vulgareFennel · Sweet Fennel · Aniseed-weed
- Forsythia suspensaGolden-bell · Weeping Forsythia · Forsythia · Golden Bell Tree
- Fouquieria splendensOcotillo · Vine-cactus
- Francoa appendiculataBridal Wreath
- Frankenia thymifoliaThyme Seaheath
- Frasera albicaulisCusick's Frasera · Modoc Frasera · White-stem Frasera · Whitestem Frasera
- Frasera fastigiataClustered Green Gentian
- Frasera speciosaElkweed
- Fraxinus anomalaUtah Ash · Dwarf Ash · Single-leaf Ash · Singleleaf Ash
- Fraxinus quadrangulataBlue Ash · Four-angled Ash
- Freesia laxaFalse Freesia · Scarlet Freesia · Scarlet Kammetjie · Anomatheca
- Fritillaria acmopetalaPointed-petal Fritillary
- Fritillaria gentneriGentner's Fritillary
- Fritillaria glaucaSiskiyou Fritillaria · Siskiyou Fritillary · Siskiyou Missionbells
- Fritillaria imperialisImperial Fritillary · Kaiser's Crown · Crown Imperial
- Fritillaria meleagrisFritillary · Guinea-hen-flower · Lazarus Bell · Chequered Lily
- Fritillaria ponticaPontic Fritillary
- Fritillaria pudicaYellow Bell · Yellow Bells · Yellow Fritillaria · Yellow Fritillary
- Fritillaria sewerzowiiSewerzow's Fritillary
- Fritillaria tubiformisTube Checkered Lily
- Fumana viridis
G
- Gagea serotinaCommon Alpine-lily · Golden Alpine Lily · Snowdon Lily · Alpine Lily · Common Alp Lily
- Gahnia clarkeiTall Saw-sedge
- Gahnia sieberianaRed-fruit Saw-sedge
- Gaillardia aristataBlanket-flower · Common Gaillardia · Brown-eyed Susan · Blanket Flower · Common Blanketflower
- Galanthus elwesiiCaucasian Snowdrop · Giant Snowdrop · Greater Snowdrop · Elwes's Snowdrop
- Galanthus nivalisBucaneve · Common Snowdrop · Flower of Hope · Snowdrop · Candlemas Bells
- Galeopsis speciosaBee Hemp-nettle · Edmonton Hempnettle · Large Hemp-nettle
- Galitzkya macrocarpaAltai Wing-seed Cress
- Gardenia jasminoidesCape Jasmine · Cape-jessamine · Gargenia
- Gaultheria depressaMountain Snowberry
- Gaultheria hispidaCopperleaf Snowberry · Snow Berry
- Gaultheria macrostigmaProstrate Snowberry
- Gaultheria trichophyllaHimalayan Snowberry
- Geissorhiza asperaBlue Satinflower · Blue-sequins · Common Satin
- Geissorhiza eurystigmaCocktail Winecup · Wine-cup
- Geissorhiza junceaRush Satin
- Gelasine elongataSmiling-face Iris
- Genista hispanica subsp. occidentalisSpanish Gorse
- Gentiana asclepiadeaWillow Gentian
- Gentiana calycosaBog Gentian · Explorer's Gentian · Mount Rainier Pleated Gentian · Rainier Pleated Gentian
- Gentianella germanicaChiltern-gentian
- Gentianella turkestanorumTurkestan Felwort
- Gentianopsis barbellataPerennial Fringed-gentian · Perennial Fringed Gentian
- Gentianopsis thermalisRocky Mountain Fringed Gentian · Feather Gentian
- Geranium maculatumSpotted Crane's-bill · Spotted Geranium · Wild Crane's-bill
- Geranium pratenseMeadow Crane's-bill · Meadow Geranium
- Geranium sanguineumBloody Crane's-bill · Bloody Geranium · Blood-red Crane's-bill
- Geranium sylvaticumWood Crane's-bill · Woodland Crane's-bill · Woodland Geranium
- Geranium wallichianumBuxton's Blue
- Geum coccineumScarlet Avens
- Geum montanumAlpine Avens
- Gillenia trifoliataBowman's Root · Fawn's Breath · Mountain Indian-physic
- Gingidia montanaMountain Carrot
- Gladiolus anatolicusAnatolian Gladiolus
- Gladiolus kotschyanusKotschy's Gladiolus
- Gladiolus murielaeAbyssinian Gladiolus · Acidanthera · Peacock Gladiolus
- Glaucidium palmatumJapanese Wood Poppy
- Glaucium elegansAnnual Horned Poppy
- Globularia nudicaulisLeafless-stemmed Globularia · Naked-stemmed Globe-daisy
- Globularia trichosanthaHair-flowered Globe Daisy · Blue Globe Daisy
- Gloriosa superbaClimbing Liliy · Climing Lily · Dragon Flower · Flame Lily
- Gomphrena haageanaRio Grande Globe Amaranth
- Goniolimon tataricumGerman Statice · Tartarian Statice · Statice
- Grevillea buxifoliaGray Spiderflower
- Gymnospermium altaicum
- Gypsophila pacificaPacific Gypsophila · Pink Baby's-breath
- Gypsophila vaccariaChina Cockle · Cowherb · Spanish Cockle
H
- Hackelia bellaBeautiful Stickseed · Greater Showy Stickseed
- Hamamelis virginianaAmerican Witchhazel · American Witchhzel · Common Witchhazel
- Hebe guthrieana
- Hedeoma hispidaFalse Pennyroyal · Mock Pennyroyal · Rough False Pennyroyal
- Hedlundia armeniacaArmenian Rowan
- Hedysarum minjanenseHeaded Sweetvetch
- Helianthemum ledifoliumSpotted Rock Rose
- Helianthemum nummulariumCommon Rock-rose · Rock Rose · Common Rock Rose
- Helianthemum oelandicumHoary Rock Rose
- Helianthemum salicifoliumWillowleaf Frostweed · Willow-leaved Rock Rose
- Helleborus argutifoliusCorsican Hellebore
- Helleborus nigerBlack Hellebore · Christmas Rose · Black Helleborus
- Helleborus orientalisLenten Rose · Lenten-rose
- Hepatica americanaAmerican Hepatica · American Liverleaf · Round-lobe Hepatica
- Hepatica americana var. acutaSharp-lobed Hepatica · Sharp-lobed Liverleaf
- Hepatica nobilisLiverleaf · Hepatica
- Herbertia lahuePrairie Nymph · Prairienymph
- Hesperantha bachmanniiRenoster Eveninglily
- Hesperantha bauriiGrassveld Eveninglily
- Hesperantha cucullataBokkeveld Eveninglily
- Hesperantha falcataSickle Eveninglily
- Hesperantha paucifloraPink Eveninglily
- Hesperochiron nanusCalifornia Hesperochiron
- Hesperoyucca whippleiOur Lord's Candle · Spanish Bayonet · Chaparral Yucca
- Heterotheca fulcrataGreen Camphorweed · Rockyscree False Goldenaster · Mountain Camphorweed
- Heuchera cylindricaAlpine Alumroot · Lava Alumroot · Mat Alumroot · Roundleaf Alumroot
- Heuchera halliiFront Range Alumroot
- Heuchera richardsoniiRichardson's Alumroot · Prairie Alumroot
- Heuchera villosaHairy Alumroot
- Hibbertia dentataToothed Guinea Flower · Trailing Guinea Flower · Twining Guinea Flower
- Hibiscus syriacusRose of Sharon · Shrub Althea
- Hibiscus trionumBladder Ketmia · Flower of an Hour · Venice Mallow
- Hieracium maculatumNoble Hawkweed · Spotted Hawkweed
- Hieracium olafiiHawkweed
- Hippophae salicifoliaWillow-leaved Sea Buckthorn
- Holodiscus discolorOceanspray · Bush Oceanspray · Creambush
- Hosta sieboldiiSiebold's Plantain Lily · Small-leaved Plantain Lily
- Houstonia caeruleaAzure Bluet · Bluets · Quaker Ladies
- Houstonia rubraRed Bluet
- Houstonia wrightiiPygmy Bluet
- Houttuynia cordataChameleon · Chameleon Flower · Chameleon Plant
- Hudsonia ericoidesPine Barren Goldenheather · False Heather · Golden-heather
- Hulsea algidaAlpine Gold · Pacific Hulsea
- Humulus lupulusBine · Common Hop · Common Hops
- Hyacinthoides hispanicaGarden Bluebell · Hispanic Hyacinthoides · Spanish Bluebell
- Hyacinthus orientalisCommon Hyacinth · Garden Hyacinth
- Hydrangea arborescensSmooth Hydrangea · Sevenbark · Tree Hydrangea · Wild Hydrangea
- Hydrangea bifidaTwo-lobed False Hydrangea · False Hydrangea
- Hydrangea hydrangeoidesJapanese Hydrangea Vine · Japanese-hydrangea · Climbing-hydrangea
- Hydrangea paniculataPanicle Hydrangea · Panicled Hydrangea · Peegee Hydrangea
- Hydrastis canadensisYellow Root · Goldenseal · Orangeroot
- Hydrophyllum capitatumBall-head Waterleaf · Dwarf Waterleaf · Woolen-breeches · Ballhead Waterleaf
- Hylomecon japonicumForest Poppy
- Hylotelephium spectabileButterfly Stonecrop · Debela Koka · Showy Stonecrop
- Hylotelephium telephioidesAllegheny Stonecrop · American Orpine · Live-for-ever
- Hymenosporum flavumAustralian Frangipani · Native Frangipani · Queensland Frangipani
- Hymenoxys grandifloraAlpine Sunflower · Graylocks Four-nerve Daisy · Graylocks Four-nerved Daisy
- Hymenoxys subintegraArizona Rubberweed
- Hypericum choisyanumChoisy's St. John's Wort · Short-stamen Hypericum
- Hypericum densiflorumBushy St. Johnswort · Dense St. Johnswort
- Hypericum olympicumOlympic St. John's-wort · Mount Olympus St. John's Wort
- Hypericum perforatumCommon St. John's Wort · Gammock · Goatweed · Common St. Johnswort
- Hypericum prolificumBroombush · Shrubby St. John's-wort · Shrubby St. Johnswort
- Hypoxis hirsutaCommon Goldstar · Yellow Star-grass · Common Star Grass
I
- Iberis umbellataGlobe Candytuft · Garden Candytuft
- Iberodes linifoliaVenus's Navelwort
- Ibicella luteaYellow Devil's Claw · Yellow Martynia · Yellow Unicorn-plant
- Ilex monticolaMountain Winterberry
- Ilex mucronataCatberry · Catberry Holly · Mountain Holly
- Ilex serrataJapanese Winterberry
- Impatiens balfouriiBalfour's Touch-me-not · Balfour's Jewelweed · Balfour's Impatiens
- Impatiens balsaminaBalsam · Spotted Snapweed · Garden Balsam
- Impatiens scabridaHimalayan Jewel Orchid · Rough Yellow Balsam · Rugged Yellow Balsam
- Incarvillea argutaHimalayan Gloxinia
- Incarvillea maireiDwarf Hardy Gloxinia
- Incarvillea olgaePrincess Trumpet-flower
- Indigofera heteranthaHimalayan Indigo
- Inula ensifoliaSwordleaf Inula
- Inula heleniumElecampane · Elecampane Inula · Horseheal
- Inula obtusifoliaBluntleaf Inula
- Inula rhizocephalaStemless Inula
- Ipheion uniflorumSpring Starflower · Spring Star
- Ipomoea leptophyllaBush Moonflower · Bush Morning-glory · Man-of-the-earth
- Ipomopsis aggregataScarlet Trumpet · Scarlet Gilia · Scarlet Skyrocket
- Ipomopsis rubraIndian Spur · Spanish Larkspur · Texas Plume · Standing-cypress
- Ipomopsis spicataSpiked Ipomopsis
- Iris acutilobaSharp-lobed Iris
- Iris albomarginataIris
- Iris aucheriAucher-Eloy Iris
- Iris baldshuanicaIris
- Iris bracteataSiskiyou Iris
- Iris bucharicaBukhara Iris
- Iris bulleyanaSouthwest Iris
- Iris chrysophyllaSlender-tubed Iris · Yellow-leaf Iris · Yellow-leaved Iris · Yellowleaf Iris
- Iris cycloglossaAfghani Iris
- Iris darwasicaDarwas Iris · Aril Iris
- Iris decoraNepal Iris · Iris
- Iris domesticaBlackberry Lily · Leopard Flower · Leopard Lily
- Iris foetidissimaGladdon · Roast-beef Plant · Stinking Gladwin · Stinking Iris
- Iris forrestiiYunnan Iris
- Iris germanicaBearded Iris · German Iris · Flags
- Iris graeberianaGraeber's Juno
- Iris halophilaSalt-loving Blue Iris · Salt Marsh Iris
- Iris ibericaIberian Flag
- Iris innominataDel Norte County Iris
- Iris kuschakewicziiKuschakewicz's Juno
- Iris lacteaWhite-flower Chinese Iris
- Iris lutescensCrimean Iris · Dwarf Iris
- Iris magnificaMagnificent Iris · Juno Iris
- Iris mandshuricaManchurian Iris
- Iris milesiiRed-flower Iris
- Iris missouriensisMissouri Flag · Rocky Mountain Iris · Western Blue Flag
- Iris paradoxaUnusual Iris · Velvet Iris
- Iris pseudacorusFlag Iris · Pale-yellow Iris · Water Flag · Paleyellow Iris
- Iris pumilaDwarf Iris · Pygmy Iris
- Iris reticulataGolden Netted Iris · Netted Iris · Winter Iris
- Iris ruthenicaBeardless Iris · Pilgrim Iris · Purple-bract Iris
- Iris sibiricaGerman Iris · Siberian Iris · Sibirian Flag
- Iris sintenisiiSintenis's Iris · Forked Iris
- Iris spuriaBlue Iris · Butterfly Iris · Seashore Iris
- Iris stenophyllaSky-blue Navruz
- Iris stoloniferaStolon-spreading Iris
- Iris subdecolorataFaded Iris
- Iris taochiaIris
- Iris tectorumCockscomb-like Water Iris · Wall Iris · Roof Iris
- Iris tuberosaSnake's-head Iris · Widow Iris
- Iris typhifoliaNorth Tombs Iris
- Iris unguicularisAlgerian Iris · Winter-flowering Iris
- Iris versicolorBlue Flag · Harlequin Blueflag · Purple Iris
- Iris vicariaIris
- Iris willmottianaWillmott's Juno
- Iris wilsoniiYellow-flowered Iris · Yellow-flower Iris
- Isatis tinctoriaDyer's Woad · Woad · Asp-of-Jerusalem
- Itea virginicaVirginia Sweetspire · Virginia-tea · Virginia-willow
- Ixia paniculataButt Ixia · Tube Kalossie · Tubular Corn-lily
- Ixia viridifloraAzure Kalossie · Green Ixia · Green Kalossie
J
- Jacaranda mimosifoliaBlack Poui · Blue Brazilian · Brazilian Rosewood · Jacaranda · Blue Jacaranda · Fern Tree
- Jacobaea abrotanifoliaPinnate-leaved Ragwort
- Jamesia americanaCliff Jamesia · Cliffbush · Fivepetal Cliffbush
- Jasione crispaDwarf Sheep's-bit
- Jeffersonia diphyllaManchuria · Rheumatism Root · Twinleaf · Blue Twinleaf · Ground Squirrel Pea · Helmet Pod
- Juglans nigraAmerican Walnut · Black Walnut · Eastern Black Walnut
- Juncus effususCommon Rush · Flutterrush · Lamp Rush
- Juncus tenuisDudley's Rush · Field Rush · Path Rush · Poverty Rush
- Juniperus horizontalisAmerican Savin · Creeping Cedar · Creeping Juniper
- Jurinea moschusGrandfather's Rose
K
- KalanchoeKalanchoe · Widow's-thrill
- Kalmia angustifoliaSheep Laurel · Lambkill · Dwarf Laurel · Wicky
- Kalmia cuneataWhite Wicky
- Kalmia hirsutaHairy Laurel · Hairy Wicky · Sandhill Laurel
- Kalmia latifoliaCalico Bush · Clamoun · Ivybush · Mountain Laurel
- Kalmia microphyllaAlpine Laurel · Bog Laurel · Western Bog Laurel
- Kalmia polifoliaBog Laurel · Pale Laurel · Swamp Laurel
- Kalmia procumbensAlpine Azalea · Trailing Azalea
- Kalopanax septemlobusCastor Aralia · Prickly Castor Oil Tree · Castor-leaved Aralia
- Keckiella corymbosaRedwood Keckiella
- Kelseya unifloraOneflower Kelseya
- Kernera saxatilisKernera
- Kigelia africanaBologna Sausage Tree · Fetishbean · German Sausage Tree · Sausage Tree
- Kirengeshoma palmataYellow Waxbells · Yellow Wax Bells
- Knautia macedonicaMacedonian Scabious
- Koelreuteria paniculataGolden-rain Tree · Panicled Goldenrain Tree · Pride of India · Golden Rain Tree
- Kolkwitzia amabilisBeauty Bush · Cold-whiskey-plant · Beautybush
- Kunzea baxteriScarlet Kunzea
- Kunzea ericifoliaSpearwood · Yellow Kunzea
L
- Laburnum × watereriGolden Chain Tree · Bean Tree
- Lachenalia algoensisAlgoa Viooltjie
- Lachenalia aloidesCape Cowslip · Threetone Viooltjie
- Lachenalia bulbiferaRed Viooltjie · Red Lachenalia
- Lachenalia corymbosaCorymb Polyxena
- Lachenalia elegansElegant Viooltjie
- Lachenalia ensifoliaCrown Polyxena
- Lachenalia glaucinaNewlands Viooltjie
- Lachenalia liliifloraLilyleaf Viooltjie
- Lachenalia medianaRenoster Viooltjie · Tinged Viooltjie
- Lachenalia nervosaGarden Route Viooltjie
- Lachenalia orchioidesOrchid Viooltjie · Wild Viooltjie
- Lachenalia orthopetalaStraight Viooltjie
- Lachenalia pallidaPale Viooltjie
- Lachenalia reflexaGolden Soldiers · Yellow Soldier · Yellow Soldier Viooltjie
- Lachenalia roseaRose Viooltjie
- Lagotis ikonnikovii
- Lagotis uralensis
- Lamium maculatumSpotted Dead-nettle · Spotted Henbit
- Lamprocapnos spectabilisAsian Bleeding-heart · Bleeding Heart · Lady in a Bath
- Larix kaempferiJapanese Larch
- Larrea tridentataCreosote Bush · Greasewood
- Lathyrus latifoliusBroad-leaf Everlasting Pea · Broad-leaved Everlasting-pea · Everlasting Pea · Perennial Pea
- Lepidium sativumCress · Cultivated Cress · Garden Cress · Gardencress Pepperweed
- Leptinella pyrethrifoliaButton Daisy
- Leucanthemum vulgareDog Daisy · Garden Chrysanthemum · Margriet · Oxeye Daisy
- Leucocrinum montanumCommon Starlily · Mountain-lily · Sand Lily
- Leucojum aestivumGiant Spring Snowflake · Loddon Lily · Snowdrop · Summer Snowflake
- Leucojum vernumSpring Snowflake
- Lewisia brachycalyxShort-sepal Bitter-root · Short-sepal Lewisia · Short-sepaled Lewisia · Shortsepal Lewisia
- Lewisia cotyledonSiskiyou Lewisia · Cliff Maids
- Lewisia nevadensisNevada Bitter-root · Nevada Lewisia
- Lewisia pygmaeaAlpine Bitterroot · Alpine Lewisia · Dwarf Bitterroot
- Lewisia redivivaOregon Bitter-root · Bitter Root
- Leycesteria formosaHimalaya-honeysuckle · Himalayan Honeysuckle · Pheasant-berry
- Liatris spicataBlazingstar · Button Snakewort · Dense Blazing Star
- Libertia chilensisChilean-iris · Satin Flower
- Libertia grandifloraMikoikoi · New Zealand Iris
- Libertia ixioidesMikoikoi · New Zealand Iris
- Libertia peregrinansMikoikoi · New Zealand Iris
- Ligularia amplexicaulisStem-clasping Ligularia
- Ligularia dentataLeopard Plant · Summer Ragwort
- Ligustrum obtusifoliumBorder Privet
- Lilium michauxiiCarolina Lily
- Limnanthes douglasiiDouglas' Meadowfoam · Meadow-foam · Poached Egg Flower
- Linanthus watsoniiWatson's Prickly Phlox
- Lindera benzoinBenjamin Bush · Northern Spicebush · Spicebush
- Linum alpinumAlpine Flax
- Linum catharticumFairy Flax · Bitter Flax · Cathartic Flax
- Linum dolomiticumDolomite Flax
- Linum kingiiKing's Flax · King's Yellow Flax
- Linum komaroviiKomarov's Flax
- Linum perenneBlue Flax · Perennial Flax
- Linum tauricumTaurian Flax
- Liquidambar styracifluaAlligator-wood · American Storax · American Sweet Gum · Sweetgum
- Liriodendron tulipiferaAmerican Tuliptree · Bois-jaune · Canary Whitewood · Tuliptree
- Lithotoma axillarisRock Isotome
- Lobelia anatinaApache Lobelia
- Lobelia angulataLawn Lobelia · Pānakenake
- Lobelia boykiniiBoykin's Lobelia
- Lobelia erinusEdging Lobelia · Garden Lobelia · Trailing Lobelia
- Lobelia inflataIndian Tobacco · Lowbelia · Puke Weed · Indian-tobacco
- Lobelia sessilifoliaSessile Lobelia
- Lobelia tupaDevil's Tobacco
- Lomatium nuttalliiNuttall Desert-parsley · Nuttall's Biscuitroot
- Lonicera maackiiAmur Honeysuckle · Bush Honeysuckle · Maack's Honeysuckle
- Lonicera obovataBlueberry Honeysuckle · Small-leaved Honeysuckle
- Lonicera tataricaTartarian Honeysuckle · Tatarian Honeysuckle · Bush Honeysuckle
- Lophospermum purpusiiLittle Snapdragon Vine
- Lotus rectusGreater Badassi · Erect Canary Clover
- Luetkea pectinataPartridgefoot
- Luzula niveaSnow-white Wood-rush · Snowy Woodrush
- Luzula pilosaHairy Wood-rush
- Lyonia marianaMaryland Staggerbush · Piedmont Staggerbush · Staggerbush
- Lysichiton americanusAmerican Skunk-cabbage · Swamp Lantern · Skunk Cabbage · American Skunkcabbage
- Lysimachia punctataDotted Loosestrife · Large Loosestrife · Large Yellow Loosestrife
- Lythrum salicariaPurple Loosestrife · Spiked Loosestrife
M
- Machaeranthera tanacetifoliaTahoka Daisy · Tansyleaf Tansyaster · Tansy-aster
- Macleaya cordataFive-seed Plume-poppy · Five-seeded Plume-poppy · Plume Poppy · Tree Celandine
- Maclura pomiferaBodark · Mock Orange · Monkey Ball · Osage Orange · Hedge Apple
- Magnolia denudataLilytree · White Magnolia
- Magnolia grandifloraSouthern Magnolia · Bull Bay
- Magnolia kobusKobus Magnolia · Kobushi Magnolia · Northern Japanese Magnolia
- Magnolia sieboldiiKorean Mountain Magnolia · Oyama Magnolia
- Magnolia tripetalaUmbrella Magnolia · Elkwood · Umbrella-tree
- Magnolia wilsoniiWilson's Magnolia
- Maianthemum racemosumFalse Solomon's-seal · False Spikenard · Feathery False Lily of the Valley
- Malus baccataChinese Crab Apple · Siberian Crab · Siberian Crab Apple
- Malvaviscus arboreusTurk's Cap · Wax Mallow · Sleeping Hibiscus
- Mandevilla laxaChilean Jasmine
- Mandragora officinarumMandrake · Mediterranean Mandrake
- Maurandya barclayanaPurple Snapdragon Vine
- Meconopsis aculeataThorny Satin Poppy
- Melaleuca glaucaAlbany Bottle-brush · Gray Bottlebrush
- Melaleuca quadrifidaOne-sided Bottlebrush
- Melampyrum lineareAmerican Cow-wheat · Linear Cow-wheat · Narrowleaf Cowwheat
- Melasphaerula gramineaFairybells
- Melicytus alpinusPorcupine Shrub
- Melissa officinalisBalm · Beebalm · Common Balm
- Menodora scabraRough Menodora
- Mentha requieniiCorsican Mint · Creeping Mint · Mint
- Mentha spicataBush Mint · Spear Mint · Spearmint
- Mentzelia chrysanthaGold Blazingstar
- Mentzelia decapetalaEvening Starflower · Evening-star · Gumbo-lily · Tenpetal Blazingstar
- Mentzelia nudaBractless Blazingstar · Goodmother · Stickleaf Mentzelia
- Menyanthes trifoliataBogbean · Buckbean · Bog Buckbean
- Mertensia bakeriBaker's Bluebells
- Mertensia canaCanescent Bluebells
- Mertensia lanceolataLance-leaved Bluebells · Lance-leaved Lungwort · Prairie Bluebells
- Mertensia maritimaOysterplant · Oyster Leaf · Sea Bluebells · Sea Lungwort
- Meum athamanticumBald-money · Spignel · Spignel-meu
- Micranthes stellarisHairy Kidney-wort · Starry Saxifrage
- Micromeria julianaJulian Savory
- Mimulus ringensAllegheny Monkey-flower · Estuary Monkeyflower · Blue Monkeyflower · Allegheny Monkeyflower
- Misopates orontiumLinearleaf Snapdragon · Weasel's-snout · Corn Snapdragon
- Mitchella repensPartridge-berry · Squawvine · Twinberry · Partridgeberry
- Mitella diphyllaTwoleaf Miterwort · Two-leaved Mitrewort · Bishop's Cap
- Modiola carolinianaCarolina Bristlemallow · Bristly-fruited Mallow · Redflower Mallow
- Moltkia petraeaBalkan Borage
- Momordica rostrataBeaked Bitter Gourd
- Monarda citriodoraLemon Beebalm · Lemon Mint · Purple Horsemint
- Monarda didymaAmerican Beebalm · Beebalm · Bergamot · Scarlet Beebalm
- Monarda punctataDotted Mint · Dotted Monarda · Horse-mint · Spotted Beebalm
- Monardella odoratissimaPacific Monardella · Coyote-mint · Mountain Coyote Mint · Mountain Monardella
- Moraea collinaCape Tulip · Cape Tulp · Cape Yellow Tulip
- Moraea huttoniiGold Tulp · Large Golden Vlei Moraea
- Moraea setifoliaPaper Glasstulp · Thread Iris
- Moraea simulansFake Glasstulp · Spotted Moraea
- Morina longifoliaLong-leaved Whorlflower · Himalayan Whorlflower
- Muenchhusia moscheutosSwamp Rose Mallow · Crimsoneyed Rosemallow · Eastern Rosemallow
- Muscari azureumAzure Grape-hyacinth
- Muscari botryoidesCommon Grape Hyacinth · Compact Grape-hyacinth
- Muscari comosumTassel Hyacinth · Tassel Grape Hyacinth · Tufted Grape Hyacinth
- Muscarimia macrocarpaYellow Grape Hyacinth
- Mussaenda roxburghiiEast Himalayan Mussaenda
- Myosotis asiaticaAsian Forget-me-not · Alpine Forget-me-not · Mountain Forget-me-not
- Myosotis sylvaticaGarden Forget-me-not · Wood Forget-me-not · Woodland Forget-me-not
- Myrica galeBog-myrtle · Meadow-fern · Sweet Gale · Sweetgale
- Myrrhis odorataAnise · Cicely · Garden Myrrh
- Myrsine nummulariaCreeping Mapou · Creeping Matipo
- Myrtus communisMyrtle
N
- Nama rothrockiiRothrock's Fiddleleaf
- Nandina domesticaChinese-bamboo · Heavenly Bamboo · Sacred Bamboo · Nandina
- NarcissusDaffodil · Narcissus · Garden Daffodil
- Narthecium ossifragumAsphodel · Bog Asphodel
- Nasa triphyllaColor Crown
- Nasturtium officinaleWatercress
- Nemastylis tenuisSouthwestern Pleatleaf
- Nemesia umbonata
- Nepeta bituminosa
- Nepeta catariaCat Mint · Catnip · Catwort
- Nepeta floccosaWoolly Catmint
- Nepeta glutinosaSticky Catmint
- Nepeta grandifloraCaucasus Catmint · Beautiful Catmint · Large-flowered Catmint
- Nerium oleanderCeylone Rose · Ceylonrose · Ceylons Rose · Oleander
- Nicandra physalodesApple of Peru · Rivabe · Shoo-fly Plant
- Nigella damascenaDamascus Hellebore · Devil in the Bush · Love-in-a-mist
- Nigella hispanicaFennel-flower · Pale Fennelflower · Spanish Fennel
- Nigella orientalisYellow Nigella
- Nivenia stokoeiStokoe's Bush Iris · Kogelberg Bluestar
- Noccaea vesicariaNetted Bladderfruit
- Nolina parryiParry Nolina · Parry's Beargrass · Parry's Nolina
- Nonea echioidesBugloss Monkswort
- Notholithocarpus densiflorusTan Bark Oak · Tanoak
- Nothoscordum bonarienseFalse Garlic
- Notothlaspi rosulatumPenwiper
- Nyctanthes arbor-tristisCoral Jasmine · Night-flowering Jasmine
- Nyssa sylvaticaBlack Gum · Black Tupelo · Sour-gum · Blackgum
O
- Ocimum basilicumBasil · Sweet Basil
- Odontostephana obliquaClimbing Milkvine
- Oenothera albicaulisWhitest Evening Primrose · Prairie Evening Primrose
- Oenothera argillicolaShale Barren Evening Primrose
- Oenothera biennisCommon Evening Primrose · Evening Primose · Evening Primrose · German Rampion
- Oenothera brachycarpaShortfruit Evening Primrose
- Oenothera cespitosaTufted Evening Primrose
- Oenothera gauraBiennial Evening-primrose · Biennial Bee-blossom · Biennial Gaura · Biennial Beeblossom
- Oenothera hartwegii subsp. fendleriFendler's Sundrops · Hartweg's Sundrops
- Oenothera lavandulifoliaLavenderleaf Sundrops
- Oenothera lindheimeriLindheimer's Beeblossom · Lindheimer's Clockweed · White Guara
- Oenothera pallidaPale Evening Primrose
- Oenothera serrulataPlains Yellow Primrose · Serrate-leaved Evening-primrose · Tooth-leaved Primrose · Yellow Sundrops · Toothed Evening Primrose
- Oenothera speciosaMexican Evening Primrose · Pink Buttercups · Pink Evening Primrose · Showy Evening Primrose · Pinkladies
- Oenothera suffrutescensScarlet Bee-blossom · Scarlet Butterfly Plant · Scarlet Gaura · Scarlet Beeblossom
- Oenothera tetragonaYellow Sundrops · Narrowleaf Evening Primrose
- Oenothera trilobaStemless Evening Primrose · Sessile Evening Primrose
- Oenothera xylocarpaWoodyfruit Evening Primrose · Sierra Evening Primrose
- Olsynium douglasiiDouglas' Blue-eyed-grass · Douglas' Grass-widow · Douglas' Olsynium · Douglas' Grasswidow
- Omalotheca norvegicaHighland Cudweed · Norwegian Arctic Cudweed · Norwegian Cudweed
- Omalotheca supinaDwarf Cudweed · Alpine Arctic Cudweed · Alpine Cudweed
- Omphalodes cappadocicaBlue-eyed-Betty · Cappadocian Navelwort · Navelwort
- Omphalodes luciliaeRock Navelwort · Rock Forget-me-not
- Onosma armenaHevajo
- Onosma nanaDwarf Onosma · Dwarf Golden-thread
- Onosma stellulataStarflower · Golden Drop
- Onosma tauricaGolden-flowered Onosma
- Opuntia tunaElephantear Pricklypear · Sour Pickle · Tuna
- Oreocarya paradoxaHandsome Cryptantha
- Oreocarya thompsoniiThompson's Cryptantha
- Oreocharis billburttiiYellow-flowered Thick-tube Gesneriad
- Oreomecon alpinaAustrian Poppy · Rhaetian Poppy · Alpine Poppy · Dwarf Poppy
- Oreomecon lapponicaLapland Poppy
- Oreomecon radicataRooted Poppy
- Oreoxis humilisPikes Peak Spring-parsley
- Origanum majoranaMarjoram · Pot Majoram · Pot Marjoram · Sweet Marjoram
- Ornithogalum candicansBerg Chink · Cape Hyacinth · Common Berg Lily
- Ornithogalum nutansDrooping Star-of-Bethlehem · Nodding Star-of-Bethlehem · Star of Bethlehem · Drooping Star of Bethlehem
- Ornithogalum pyrenaicumBath Asparagus · Pyrenees Star of Bethlehem · Spiked Star-of-Bethlehem
- Ornithogalum umbellatumGarden Star-of-Bethlehem · Nap-at-noon · Sleepy-dick · Star of Bethlehem
- Orostachys malacophyllaSpatulate Rock Pine
- Orthrosanthus chimboracensisMexican Morning Flower · Páramo Lily · Little Star
- Osbeckia stellataStarry Osbeckia
- Ostrya virginianaAmerican Hop-hornbeam · Eastern Hop-hornbeam · Hophornbeam
- Ourisia macrophyllaMountain Foxglove
- Ourisia polyanthaCliftonville Scarlet
- Oxyria digynaMountain Sorrel · Alpine Mountain-sorrel · Alpine Sorrel · Alpine Mountainsorrel
- Oxytropis humifusaSprawling Locoweed
- Oxytropis multicepsNuttall's Oxytrope
- Oxytropis sericeaEarly Yellow Locoweed · Locoweed · Silky Crazyweed · White Locoweed
- Oxytropis williamsii
P
- Pachystegia minorSmall Marlborough Rock Daisy · Marlborough Rock Daisy
- Packera aureaGolden Ragwort
- Paeonia anomalaAnomalous Peony
- Paeonia broteriIberian Peony · Spanish Peony · Brotero's Peony
- Paeonia browniiBrown's Peony · Western Peony
- Paeonia cambessedesiiMajorcan Peony · Balearic Peony
- Paeonia daurica subsp. mlokosewitschiiGolden Peony · Molly the Witch
- Paeonia delavayiDelavay's Tree Peony · Dian Mu Dan · Tree Peony · Yellow Tree Peony
- Paeonia emodiHimalayan Peony
- Paeonia obovataChinese Peony · Woodland Peony
- Paeonia officinalisCommon Peony · European Peony · Garden Peony
- Paeonia × suffruticosaTree Peony · Moutan Peony
- Pancratium maritimumSea Daffodil · Sweet Spider-lily · Sea-daffodil
- Pandorea jasminoidesBower Vine · Bowerplant
- Papaver cambricumPoppy · Welsh Poppy
- Papaver heterophyllumFlaming-poppy · Wind-poppy · Windpoppy
- Papaver pilosumHairy Poppy
- Papaver somniferumOpium Poppy · Breadseed Poppy · Garden Poppy
- Paradisea liliastrumSt. Bruno's Lily
- Paris quadrifoliaHerb Paris · True Lover's Knot
- Parnassia fimbriataFringed Grass of Parnassus
- Parnassia glaucaAmerican Grass-of-Parnassus · Blue-green Grass-of-Parnassus · Fen Grass of Parnassus
- Parnassia palustrisBog Star · Grass of Parnassus · Marsh Parnassia · Marsh Grass of Parnassus
- Parrotia persicaPersian Ironwood · Persian Witch-hazel · Parrottia
- Parrotiopsis jacquemontianaJacquemont's Parrotiopsis
- Parrya schugnana
- Parthenocissus quinquefoliaAmerican Ivy · Five-leaf-ivy · Five-leaved Ivy · Virginia Creeper
- Parthenocissus tricuspidataBoston Ivy · Grape Ivy · Japanese Creeper
- Pedicularis rainierensisMount Rainier Lousewort · Mt. Rainier Lousewort
- Pediocactus simpsoniiMountain Ball Cactus · Simpson's Hedgehog Cactus · Simpson's Foot Cactus
- Pennellianthus frutescensShrubby Beardtongue
- Penstemon acaulisStemless Beardtongue
- Penstemon acuminatusSharpleaf Penstemon · Sand Dune Penstemon · Sand-dune Beardtongue
- Penstemon angustifoliusBroadbeard Beardtongue · Narrow Beardtongue · Narrow-leaf Penstemon
- Penstemon arenicolaRed Desert Penstemon · Sand Beardtongue · Sand Penstemon
- Penstemon barbatusBeardlip Beardtongue · Beardlip Penstemon
- Penstemon breviculusShortstem Beardtongue
- Penstemon caespitosusMat Beardtongue · Mat Penstemon
- Penstemon centranthifoliusScarlet Bugler
- Penstemon cobaeaPrairie Penstemon · Wild Foxglove · Cobaea Beardtongue
- Penstemon crandalliiCrandall's Beardtongue
- Penstemon cyathophorusSagebrush Beardtongue
- Penstemon doliusJones' Beardtongue
- Penstemon duchesnensisDuchesne Penstemon
- Penstemon eatoniiEaton's Beardtongue · Eaton's Penstemon · Firecracker Beardtongue · Firecracker Penstemon
- Penstemon eriantherusCrested Beardtongue · Crested-tongue Beardtongue · Fuzzy-tongue Beardtongue · Fuzzytongue Penstemon
- Penstemon flowersiiFlowers' Beardtongue
- Penstemon gairdneriGairdner's Beardtongue · Gairdner's Penstemon
- Penstemon globosusGlobe Beardtongue · Globe Penstemon
- Penstemon goodrichiiLapoint Beardtongue · Lapoint Penstemon
- Penstemon gracilisLilac Beardtongue · Lilac Penstemon · Lilac-flowered Beardtongue
- Penstemon halliiHall's Beardtongue
- Penstemon harbouriiHarbour's Beardtongue
- Penstemon heterophyllusBunchleaf Penstemon
- Penstemon hirsutusHairy Beardtongue · Northeastern Beardtongue
- Penstemon humilisLow Beardtongue · Low Penstemon · Lowly Beardtongue
- Penstemon jamesiiJames' Beardtongue · James' Penstemon
- Penstemon janishiaeAntelope Valley Beardtongue · Janish's Beardtongue
- Penstemon lemhiensisLemhi Beardtongue · Lemhi Penstemon
- Penstemon lentusHandsome Beardtongue
- Penstemon lyalliLyall's Beardtongue · Lyall's Penstemon
- Penstemon mensarumGrand Mesa Beardtongue · Tiger Beardtongue
- Penstemon moffattiiMoffatt's Beardtongue
- Penstemon monoensisMono Beardtongue · Mono Penstemon
- Penstemon montanusMountain Beardtongue · Mountain Penstemon · Cord-root Penstemon · Cordroot Beardtongue
- Penstemon nitidusWax-leaf Beardtongue · Shining Penstemon · Smooth Blue Beardtongue · Waxleaf Penstemon
- Penstemon pachyphyllusThick-leaf Penstemon · Thickleaf Beardtongue
- Penstemon paysoniorumPayson Beardtongue · Payson's Beardtongue
- Penstemon retrorsusAdobe Hills Beardtongue
- Penstemon scapoidesWestgard Pass Beardtongue · Pinyon Beardtongue
- Penstemon secundiflorusOneside Penstemon · Sidebells Beardtongue · Sidebells Penstemon
- Penstemon speciosusRoyal Beardtongue · Royal Penstemon · Showy Penstemon
- Penstemon teucrioidesGermander Beardtongue
- Penstemon uintahensisUinta Mountain Beardtongue · Uintah Beardtongue
- Penstemon utahensisUtah Penstemon
- Penstemon virensFront Range Beardtongue · Blue Mist Penstemon
- Penstemon whippleanusDusky Beardtongue · Dusky Penstemon · Whipple's Beardtongue · Whipple's Penstemon
- Periploca graecaGrecian Silkvine · Silkvine
- Petalonyx nitidusShining Sandpaper-plant · Shiny-leaf Sandpaper Plant · Shiny Sandpaper Plant · Shinyleaf Sandpaper Plant
- Petrophytum caespitosumMat Rock Spiraea · Mat Rockspirea · Rock-spiraea
- Petrosedum subulatumStonecrop
- Petroselinum crispumGarden Parsley · Parsley · Common Parsley
- Phacelia bipinnatifidaPurple Phacelia · Fernleaf Phacelia · Forest Phacelia
- Phacelia campanulariaCalifornia Bluebell · Desert Bluebells · Desert Phacelia · Desertbells
- Phacelia grandifloraLarge-flowered Phacelia · Largeflower Phacelia
- Phacelia sericeaSilky Scorpionweed · Purplefringe · Silky Phacelia
- Phalocallis coelestisGoblet Flower
- Phemeranthus calycinusLarge-flowered Fameflower · Largeflower Fameflower · Fameflower
- Phemeranthus sediformisOkanagan Fameflower · Okanagan Talinum · Okanogan Fameflower
- Phemeranthus spinescensSpiny Fameflower
- Phemeranthus teretifoliusAppalachian Rock-pink · Eastern Fameflower · Quill Fameflower
- Philadelphus coronariusEuropean Mock-orange · Mock Orange · Philadelphia Mock-orange · Sweet Mock Orange
- Phlomis fruticosaJerusalem Lampwick · Jerusalem Sage · Shrubby Jerusalem Sage
- Phlomis samiaGreek Lampwick · Greek Sage · Twilit Lampwick
- Phlomoides tuberosaCandypink Torchwort · Tuberous Jerusalem Sage
- Phlox diffusaCascade Phlox · Mat Phlox · Spreading Phlox
- Phlox divaricataWild Blue Phlox · Woodland Phlox · Wild Sweet William
- Phlox glaberrimaSmooth Phlox
- Phlox hoodiiHood's Phlox · Carpet Phlox · Moss Phlox · Spiny Phlox
- Phlox longifoliaLong-leaved Phlox · Longleaf Phlox
- Phlox multifloraMany-flowered Phlox · Rocky Mountain Phlox · Yellowstone Phlox · Flowery Phlox
- Phlox paniculataFall Phlox · Fall-pink · Garden Phlox
- Phlox pilosaDowny Phlox · Prairie Phlox
- Phlox pulchraAlabama Phlox · Wherry's Phlox
- Phlox pulvinataAlpine Phlox · Cushion Phlox
- Phlox speciosaBush Phlox · Showy Phlox
- Phoenicaulis cheiranthoidesDaggerpod · Wallflower Phoenicaulis
- Phoenix dactyliferaDate · Date Tree · Date Palm
- Phormium colensoiMountain Flax
- Phormium tenaxLowland Flax · New Zealand Flax · New Zealand Hemp
- Phygelius aequalisCape Fuschia · Northern Shadewort · River Bell
- Phygelius capensisCape Figwort · Cape Fuchsia · Southern River Bells · Cape-fuchsia
- Phyllodoce caeruleaBlue Heath · Blue Mountain Heath · Scottish Menziesia · Blue Mountainheath
- Phyllodoce nipponicaJapanese Mountain Heather
- Phyllostachys edulisMoso Bamboo · Tortoise Shell Bamboo
- Physaria fendleriFendler's Bladderpod · Lesquerella
- Physaria newberryiNewberry Twinpod · Newberry's Twinpod
- Physoplexis comosaTufted Horned Rampion · Devil's Claw
- Physostegia virginianaFalse Dragonhead · Obedience · Obedient Plant
- Phyteuma serratumCorsican Rampion · Saw-toothed Rampion
- Phytolacca americanaAmerican Nightshade · American Pokeweed · American Spinach
- Picea abiesCommon Spruce · Norway Spruce · White Spruce
- Picea marianaBog Spruce · Black Spruce · Shortleaf Black Spruce
- Picea pungensColorado Blue-spruce · Colorado Spruce · Blue Spruce
- Pieris japonicaHeath · Japanese Pieris · Japanese Andromeda
- Pimelea prostrataNew Zealand Daphne · Pinatoro · Strathmore Weed
- Pimpinella anisumAnise Burnet Saxifrage · Anise · Sweet-cumin
- Pinellia ternataCrowdipper · Pinellia
- Pinguicula vulgarisCommon Butterwort · Butterwort
- Pinnasa nana
- Pinus elliottiiAmerican Pitch Pine · Slash Pine · Longleaf Pitch Pine
- Pittosporum crassicaule
- Plagiorhegma dubiumAsian Twinleaf
- Plantago coronopusBuck's Horn Plantain · Buckhorn Plantain · Cut-leaved Plantain
- Plantago lanceolataBuckhorn · Buckhorn Plantain · English Plantai · Narrowleaf Plantain
- Plantago majorBroadleaf Plantain · Buckhorn Plantain · Common Plantain
- Plantago maritimaGoose Tongue · Sea Kemp · Sea Plantain
- Plantago patagonicaPatagonia Plantain · Woolly Indianwheat · Woolly Plantain
- Plantago virginicaVirginia Plantain · Virginian Plantain · Dwarf Plantain
- Platycodon grandiflorusBalloon-flower · Chinese-bellflower · Platycodon
- Pleiospilos bolusiiMimicry Plant · Stone Quaggafig
- Plocama calabricaStinking Madder
- Plumeria emarginataFrangipani
- Polemonium caeruleumBlue Jacob's Ladder · Charity · Greek Valerian
- Polemonium chartaceumMason's Jacob's-ladder · Mason's Sky Pilot · White Mountain Sky-pilot
- Polemonium pulcherrimumBeautiful Jacob's-ladder · Pretty Jacob's-ladder · Short Jacob's-ladder · Jacob's-ladder
- Polemonium reptansSpreading Jacob's Ladder · Creeping Jacob's Ladder · Greek Valerian · Abscess Root
- Polemonium vanbruntiaeAppalachian Jacob's-ladder · Jacob's Ladder · Van Brunt's Jacob's-ladder · Vanbrunt's Polemonium
- Polemonium villosumTall Jacob's-ladder
- Polemonium viscosumSkunk Jacob's-ladder · Skunk Polemonium · Sticky Jacob's-ladder · Sticky Polemonium
- Polygala calcareaChalk Milkwort
- Polygonatum biflorumAmerican Solomon's-seal · Honey-flowered Solomon's Seal · King Solomon's Seal · Smooth Solomon's Seal
- Polygonatum glaberrimumSmooth Solomon's Seal · Caucasian Solomon's Seal
- Polygonatum humileDwarf Solomon's Seal
- Portulaca pilosaKiss Me Quick · Chisme · Hairy-pigweed
- Potentilla atrosanguineaRuby Cinquefoil
- Potentilla indicaFalse Strawberry · Indian Strawberry · Mock Strawberry
- Potentilla megalanthaLarge-flowered Cinquefoil
- Potentilla rectaErect Cinquefoil · Erect Potentil · Roughfruit Cinquefoil · Sulfur Cinquefoil
- Pourthiaea villosaOriental Photinia
- Primula bullataPrimrose
- Primula bulleyanaBulley's Primrose
- Primula buryanaEverest Nodding Primrose
- Primula cockburnianaCockburnia Primrose
- Primula denticulataDrumstick Primrose · Drumstick Primula
- Primula elatiorOxlip
- Primula fassettiiJeweled Shootingstar
- Primula flexuosaWinding Primrose
- Primula florindaeHimalayan Cowslip · Tibetan Cowslip
- Primula frondosaLeafy Primrose
- Primula geraniifoliaGeranium Primrose
- Primula iljinskiiIljinski's Primrose
- Primula japonicaJapanese Cowslip · Japanese Primrose
- Primula jeffreyiSierra Shooting Star · Jeffrey's Shooting Star · Tall Mountain Shooting Star
- Primula luteolaPrimrose
- Primula meadiaEastern Shooting Star · Common Shooting Star · Pride of Ohio · Midland Shooting Star
- Primula mistassinicaLake Mistassini Primrose · Mistassini Primrose · Bird's-eye Primrose
- Primula nevadensisNevada Primrose
- Primula pamiricaPamir Primrose
- Primula paucifloraDark-throat Shootingstar · Southern Shootingstar · Darkthroat Shootingstar
- Primula pulverulentaMealy Cowslip
- Primula rotundifoliaRound-leaved Primrose
- Primula sieboldiiEast Asian Primrose · Japanese Primrose · Siebold's Primrose
- Primula specuicolaCave-dwelling Primrose · Cavedwelling Primrose
- Primula tetrandraAlpine Shootingstar
- Primula verisCowslip · Cowslip Primrose · English Cowslip
- Primula violaceaPurple-spiked Primrose
- Primula warshenewskianaPrimrose
- Prometheum pilosumPretty Rock Navel
- Prosartes lanuginosaYellow Fairybells · Yellow Mandarin
- Prunella vulgarisAlpine Self-heal · Common Self Heal · Heal-all · Common Selfheal
- Prunus aviumBird Cherry · Gean · Gean Cherry · Sweet Cherry
- Prunus serotinaBlack Cherry · Black Chokecherry · Rum Cherry
- Prunus serrulataFlowering Cherry · Hill Cherry · Japanese Cherry · Japanese Flowering Cherry
- Psathyrotes piliferaHairybeast Turtleback
- Pseudocydonia sinensisChinese Quince · Chinese-quince
- Pseudofumaria luteaBeaked Corydalis · Yellow Corydalis · Yellow Fumitory · Rock Fumewort
- Pseudotsuga menziesiiDougie · Douglas Fir · Douglas Spruce · Douglas-fir
- Psidium guajavaGuava · Guava Tree · Guave Tree
- Psychotria nervosaBastard Canckerberry · Bastard Cankerberry · Seminole Balsamo
- Pterostyrax hispidusFragrant Epaulette Tree · Epaulette Tree
- Pulsatilla campanellaBell Pasqueflower
- Pulsatilla grandisGreater Pasque Flower
- Pulsatilla occidentalisMountain Pasqueflower · Western Anemone · Western Pasqueflower · White Pasqueflower
- Pulsatilla vulgarisPasqueflower · European Pasqueflower · Common Pasqueflower
- Pulsatilla wallichianaPasqueflower
- Purshia mexicanaMexican Cliffrose
- Purshia tridentataAntelope Brush · Buck Brush · Antelope Bitterbrush
- Pyrus calleryanaBradford · Bradford Pear · Callery Pear
- Pyrus pyrifoliaAsian Pear · Chinese Pear · Oriental Pear Tree
- Pyxidanthera barbulataBig Pyxie · Common Pyxie-moss · Flowering Pixiemoss
Q
- Quercus albaStave Oak · White Oak · Eastern White Oak
- Quercus coccineaScarlet Oak
- Quercus phellosWillow Oak
- Quercus rubraNorthern Red Oak · Red Oak · Champion Oak
- Quercus virginianaSouthern Live Oak · Virginia Live Oak · Live Oak
R
- Ramonda heldreichiiOlympus Violet
- Ramonda myconiPyrenean Violet · Pyrenean Ramonda
- Ranunculus acrisMeadow Buttercup · Tall Buttercup · Common Buttercup
- Ranunculus adoneusAlpine Buttercup · Snow Buttercup
- Ranunculus bulbosusBulbous Buttercup · St. Anthony's Turnip
- Ranunculus glacialisGlacier Buttercup · Glacier Crowfoot
- Ranunculus gramineusGrass-leaved Buttercup
- Ranunculus hispidusBristly Buttercup · Rough Buttercup · Hispid Buttercup
- Ranunculus illyricusIllyrian Buttercup
- Ranunculus lyalliiMount Cook Buttercup · Mount Cook Lily · Mountain Lily
- Ranunculus repensCreeping Buttercup · Double-flowered Creeping Buttercup · Creeping Crowfoot
- Ratibida columniferaMexican Hat · Long-headed Coneflower · Longhead-coneflower · Upright Prairie Coneflower
- Rehmannia piasezkiiChinese Foxglove
- Reseda odorataGarden Mignonette · Bastard Rocket · Common Mignonette
- Rheum compactumCompact Rhubarb · Thick-leaved Rhubarb
- Rheum ribesSyrian Rhubarb · Currant-fruited Rhubarb · Warty-leaved Rhubarb
- Rheum tibeticumTibetan Rhubarb
- Rhodiola integrifoliaEntire-leaved Rosewort · Entire-leaved Stonecrop · King's Crown · Ledge Stonecrop
- Rhododendron anthopogonDwarf Rhododendron
- Rhododendron catawbienseCatawba Rosebay · Catawba Rhododendron · Purple Ivy
- Rhododendron groenlandicumBog Labrador Tea · Greenland Labrador Tea · Labrador Tea
- Rhododendron lepidotumScaly Rhododendron · Willow-leaved Rhododendron
- Rhodolirium andicolaAndean Añañuca · Copahue Flower
- Rhodolirium montanum
- Rhodotypos scandensBlack Jetbead · Jetbead
- Ribes americanumAmerican Black Currant · Blank Currant · Wild Black Currant
- Ribes cereumSquaw Currant · Wax Currant · White Currant
- Ribes lacustrePrickly Currant · Black Gooseberry · Black Swamp Gooseberry
- Rivina humilisBaby Pepper · Coral-berry · Jumbi Pepper · Rougeplant
- Romanzoffia sitchensisSitka Mistmaid · Sitka Mistmaiden · Sitka Romanzoffia
- Romneya coulteriCalifornia Tree-poppy · Coulter's Matilija Poppy · Matilija Poppy
- Rorippa islandicaMarsh Cress · Northern Yellow-cress · Yellow Watercress · Northern Marsh Yellowcress
- Rosa albaWhite Rose of York · White Rose
- Rosa carolinaCarolina Rose · Pasture Rose
- Rosa gallicaApothecary Rose · Apothecary's Rose · Cabbage Rose · French Rose
- Rosa multifloraBaby Rose · Japanese Rose · Many-flowered Rose · Multiflora Rose
- Rosa palustrisSwamp Rose · Marsh Rose
- Rosa pauliiPaul's Rose
- Rosa virginianaVirginian Rose · Virginia Rose
- Roscoea alpinaDwarf Kakoli Ginger · Mountain Roscoe Lily
- Rubus argutusSawtooth Blackberry · Highbush Blackberry · Prickly Florida Blackberry
- Rubus odoratusAmerican Bramble · Purple-flowered Raspberry · Purpleflowering Raspberry
- Rubus parviflorusThimbleberry
- Rudbeckia occidentalisWestern Cone-flower · Western Coneflower
- Ruellia humilisFringe-leaf Ruellia · Fringeleaf Wild Petunia · Wild Petunia
- Rumex acetosaCommon Sorrel · Garden Sorrel · Garden Dock
- Rumex acetosellaCommon Sheep Sorrel · Field Sorrel · Red Sorrel
- Rumex alpinusMonk's-rhubarb · Munk's Rhubarb · Alpine Dock
- Rumex crispusCurled Dock · Curly Dock · Narrowleaf Dock
- Rumex obtusifoliusBitter Dock · Broad-leaved Dock · Broadleaf Dock
- Rumex patientiaHerb-patience · Patience Dock · Spinach Dock
- Rumex scutatusBuckler-leaved Sorrel · French Sorrel
- Rumex venosusSand Dock · Veined Dock · Veiny Dock
- Rupicapnos africanaAfrican Rupicapnos
- Ruta corsicaCorsican Rue
- Ruta graveolensAve Grace · Common Rue · Countryman's Tracle
S
- Sabal minorDwarf Palmetto · Latanier · Blue-stem Palmetto · Bluestem Palmetto
- Sabatia kennedyanaPlymouth Gentian · Plymouth Rose Gentian · Large Sabatia
- Sagina procumbensBird-eye Pearlwort · Birdseye Pearlwort · Matted Pearlwort · Birdeye Pearlwort
- Sagittaria latifoliaBroadleaf Arrowhead · Common Arrowhead · Duck Potato
- Salix cascadensisCascade Willow
- SalpiglossisPainted Tongue
- Salvia abrotanoidesCaspian Sage · Clouding Sage · Southernwood Sage
- Salvia argenteaSilver Sage
- Salvia candidissimaBlazing White Sage
- Salvia cyanescensTurkish Lilac Sage
- Salvia dumetorumEastern Meadow Sage
- Salvia glutinosaJupiter's Distaff · Sticky Clary · Sticky Sage
- Salvia hiansHimalayan Blue Sage
- Salvia huberi
- Salvia moorcroftianaLadakhi Sage
- Salvia officinalisCommon Sage · Culinary Sage · Golden Sage · Kitchen Sage
- Salvia repensCreeping Sage
- Salvia rosmarinusRosemary
- Salvia sclareaClary · Clary-sage · Europe Sage · Clary Sage
- Sambucus canadensisAmerican Black Elderberry · American Elder · American Elderberry
- Sambucus nigraElder · Elderberry · European Black Elder · Black Elderberry
- Sambucus racemosaAmerican Red Elderberry · European Red Elder · European Red Elderberry · Red Elderberry
- Sandersonia aurantiacaChinese-lantern Lily · Christmasbells · Golden-lily-of-the-valley
- Sanguisorba minorSmall Burnet · Burnet Bloodwort · Fodder Burnet
- Sanguisorba officinalisGreat Burnet · Burnet Bloodwort · Official Burnet
- Sanicula arctopoidesBear's-foot Sanicle · Yellow Mats · Footsteps of Spring
- Santolina pectinata
- Saponaria caespitosaTufted Soapwort
- Saponaria ocymoidesRock Soapwort · Tumbling-Ted
- Sauromatum venosumVoodoo Lily · Monarch-of-the-East · Red-calla
- Saxifraga aizoidesYellow Saxifrage · Evergreen Saxifrage · Yellow Mountain Saxifrage
- Saxifraga caesiaBlue Saxifrage
- Saxifraga chrysanthaGoldbloom Saxifrage · Golden Saxifrage
- Saxifraga cotyledonPyramidal Saxifrage
- Saxifraga flagellarisSpider Saxifrage · Spider-legged Saxifrage · Stoloniferous Saxifrage · Whiplash Saxifrage
- Saxifraga hirculusMarsh Saxifrage · Yellow Marsh Saxifrage
- Saxifraga oppositifoliaPurple Saxifrage · Purple Alpine Saxifrage · Purple Mountain Saxifrage
- Scabiosa pyrenaicaPiedmont Scabious · Woolly Scabious
- Schizanthus grahamiiPoor Man's Orchid
- Schizopetalon walkeriAlmond-scented Split-petal Cress
- Scilla bifoliaAlpine Squill · Two-leaf Squill
- Scilla luciliaeBoissier's Glory-of-the-snow · Lucile's Glory-of-the-snow · Lucile's Squill
- Scilla roseniiRosen's Squill · White-eyed Squill
- Scilla sibericaSiberian Squill · Wood Squill
- Scirpoides holoschoenusRound-headed Clubrush · Roundhead Bulrush
- Scleranthus biflorusKnawel · Two-flower Knawel
- Scleranthus uniflorusSingle-flowered Knawel · Knawel Cushion
- Scrophularia lanceolataAmerican Figwort · Early Figwort · Hare Figwort · Lanceleaf Figwort
- Scrophularia nodosaCommon Figwort · Knotted Figwort · Figwort · Woodland Figwort
- Scutellaria integrifoliaHelmet Flower
- Scutellaria novae-zelandiaeNew Zealand Skullcap · Shovel Mint
- Scutellaria resinosaSticky Skullcap
- Sedum lanceolatumLanceleaf Stonecrop · Spearleaf Stonecrop
- Sedum stelliformeHuachuca Mountain Stonecrop
- Senecio amplectensAlpine Groundsel · Showy Alpine Ragwort
- Senega luteaOrange Milkwort
- Senega nuttalliiNuttall's Milkwort
- Senega officinalisSeneca Snakeroot · Senega Snakeroot · Senega-root
- Sequoiadendron giganteumBigtree · Giant Sequoia · Sequoia
- Seseli gummiferumMoon Carrot
- Shawia insignisMarlborough Daisy · Marlborough Rock Daisy
- Shepherdia canadensisCanada Buffaloberry · Canadian Buffalo-berry · Bitterberry · Russet Buffaloberry
- Shoshonea pulvinataShoshone Carrot
- Sibbaldia procumbensCreeping Sibbaldia · Least Cinquefoil · Creeping-glow-wort
- Sideranthus coloradoensisColorado Tansy Aster
- Sideritis hyssopifoliaMountain Tea · Rock Tea
- Silene argaeaTurkish Catchfly
- Silene carolinianaWild Pink · Sticky Catchfly
- Silene chalcedonicaLondon Pride · Maltese Cross · Maltese-cross Campion
- Silene colorataCarmine Catchfly
- Silene coronariaBloody William · Crown Pink · Dusty-miller
- Silene delavayiSouthwestern Catchfly
- Silene dioicaRed Campion · Red Catchfly · Red Cockle
- Silene flos-cuculiMeadow Campion · Ragged Robin
- Silene flos-jovisFlower-of-Jove
- Silene gallicaCommon Catchfly · English Catchfly · French Catchfly
- Silene laciniataIndian-pink · Mexican Campion · Mexican Catchfly · Cardinal Catchfly
- Silene latifoliaBladder Campion · White Campion · White Cockle
- Silene pendulaNodding Catchfly · Drooping Catchfly
- Silene ruprechtiiCatchfly · Campion
- Silene samojedorumSamoyed Campion
- Silene unifloraSea Campion
- Silene virginicaVirginia Campion · Virginia Catchfly · Fire Pink
- Silene wilfordiiWilford Campion
- Sisyrinchium angustifoliumBlue-eyed Grass · Common Blue-eyed Grass · Narrow-leaf Blue-eyed-grass · Narrowleaf Blue-eyed Grass
- Sisyrinchium bellumWestern Blue-eyed Grass
- Sisyrinchium campestrePrairie Blue-eyed Grass
- Sisyrinchium demissumDwarf Blue-eyed Grass · Stiff Blue-eyed Grass
- Sisyrinchium littoraleAlaska Blue-eyed Grass · Shore Blue-eyed-grass
- Skimmia japonicaJapanese Skimmia
- Smilax feroxFierce Smilax
- Smyrnium perfoliatumPerfoliate Alexanders
- Solanum melongenaAubergine · Eggplant · Brinjal
- Solanum pseudocapsicumFalse Jerusalem Cherry · Jerusalem Cherry · Madeira Cherry
- Solanum sisymbriifoliumDense Thorned Bitter Apple · Litchi Tomato · Red Buffalo-bur · Sticky Nightshade
- Soldanella carpaticaCarpathian Snowbell
- Soldanella hungaricaHungarian Snowbell
- Solidago spathulataMt. Albert Goldenrod · Spikelike Goldenrod · Coast Goldenrod
- Sophora microphyllaSmall-leaved Kowhai · Small-leaved Kōwhai · Weeping Kōwhai · Kowhai
- Sorbus americanaAmerican Mountain-ash · Dogberry · Mountain-ash · American Mountain Ash
- Sparaxis parvifloraHarlequin Flower
- Sparaxis variegataBluethroat Silklily
- Sparaxis villosaBlue-cap · Bluecap Silklily
- Spathodea campanulataAfrican Flame Tree · African Tuliptree · Flame of the Forest
- Spergularia rubraPurple-sandwort · Red Sand Spurrey · Red Sandspurry
- Spergularia rupicolaRock Sea-spurrey
- Sphaeralcea ambiguaDesert Globemallow · Desert Mallow · Apricot Globe-mallow
- Sphaeralcea coccineaCowboy's Delights · Orange Globemallow · Copper Mallow · Scarlet Globemallow
- Sphaeralcea incanaGray Globemallow · Soft Globe-mallow
- Sphaeromeria capitataRock Tansy
- Spigelia marilandicaIndian-pink · Woodland Pink · Worm-grass · Woodland Pinkroot
- Spiraea albaMeadowsweet · Pale Bridewort · White Meadowsweet
- Spiraea betulifoliaBirch-leaved Meadowsweet · Birch-leaved Spirea · Birchleaf Spirea · White Spirea
- Spiraea canescensHimalayan Spiraea · Himalayan Spirea
- Spiraea japonicaJapanese Meadowsweet · Japanese Spiraea · Fortune Meadowsweet
- Stachys alpinaAlpine Woundwort · Limestone Woundwort · Alpine Woundwort / Limestone Woundwort
- Stachys chinensisBetony · Woundwort
- Stachyurus chinensisChinese Spiketail
- Stephanotis floribundaMadagascar-jasmine · Bridalwreath · Chaplet-flower
- Stewartia pseudocamelliaDeciduous Camellia · Japanese Stewartia · Korean Stewartia
- Streptopus lanceolatusRose Twisted Stalk · Rosybells · Rose Mandarin
- Stylidium graminifoliumGrass Triggerplant
- Stypandra glaucaNodding Blue Lily
- Styrax obassiaFragrant Snowbell · Big-leafed Storax · Fragrant Styrax
- Succisella inflexaSouthern Succisella · Frosted Pearls
- Swertia perennisAlpinebog Swertia · Felwort · Marsh Felwort
- Symphoricarpos orbiculatusBuck Brush · Coralberry · Indian-currant
- Symplocarpus foetidusPolecatweed · Skunk Cabbage · Eastern Skunk Cabbage
- Syringa reticulataJapanese Tree Lilac · Tree Lilac
T
- Tanacetum dolichophyllumLong-leaved Tansy
- Taraxacum officinaleBlowball · Common Dandelion · Dandelion
- Taxus baccataCanada Yew · Common Yew · English Yew
- Teesdalia confertaShepherd's Cress
- Telesonix jamesiiJames' Saxifrage · James' Telesonix · James's Telesonix
- Tellima grandifloraFringecup · Fringecups · Big-flowered Fringecup · Bigflower Tellima
- Tetradium danielliiBee-bee Tree · Korean Euodia · Korean Evodia
- Tetraneuris acaulisStemless Four-nerve Daisy · Stemless Hymenoxys · Butte Marigold
- Tetrataenium nepalenseNepal Cowparsnip
- Thalictrum dioicumEarly Meadow-rue · Quicksilver-weed
- Thalictrum lucidumMeadow-rue · Shining Meadow-rue
- Thalictrum minusLesser Meadow-rue · Small Meadowrue
- Thalictrum petaloideumPetaloid Meadow-rue
- Thalictrum rochebrunnianumLavender Mist Meadow Rue
- Thalictrum thalictroidesRue Anemone · Windflower
- Thalictrum tuberiferumTuberous-rooted Meadow-rue
- Thalictrum tuberosumTuberous Meadow-rue · Meadow Rue
- Thomasia quercifoliaOak-leaved Thomasia
- Thuja occidentalisAmerican Arbor-vitae · Arbor-vitae · Eastern Arbor-vitae · Arborvitae
- Thymus incertusThyme
- Thymus vulgarisCommon Thyme · English Thyme · Garden Thyme
- Thysanotus multiflorusMany-flowered Fringe Lily
- Tiarella cordifoliaHeartleaf Foamflower · False Miterwort · Coolwort
- Tiarella wherryiTufted Foamflower · Wherry's Foamflower
- Tigridia pavoniaMexican Shellflower · Peacock-flower · Tiger-flower
- Tofieldia pusillaScotch False Asphodel · Scottish Asphodel · Scottish False Asphodel
- Townsendia eximiaTall Townsend Daisy · Rocky Mountain Townsend-daisy
- Townsendia exscapaEaster Daisy · Dwarf Townsendia · Low Townsend-daisy · Stemless Townsend Daisy
- Townsendia formosaSmooth Townsend Daisy
- Toxicoscordion fremontiiFremont's Death Camas
- Trachelium rumelicumThroatwort
- Trachymene caeruleaBlue Lace Flower · Rottnest Daisy
- Trachyspermum ammiAjowan · Ethiopian-caraway · Bishop's-weed · Ajowan Caraway
- Tradescantia bracteataBracted Spiderwort · Longbract Spiderwort · Prairie Spiderwort
- Tradescantia longipesDwarf Spiderwort · Wild Crocus
- Trichophorum alpinumAlpine Bulrush · Cotton Deergrass · Hudson Bay Clubrush
- Trichostema dichotomumBastard Pennyroyal · Blue Curls · Forked Blue-curls · Forked Bluecurls
- Trifolium dasyphyllumAlpine Clover · Whip-root Clover
- Trifolium pratenseChilean Clover · Cowgrass Clover · Mammoth Red Clover · Red Clover
- Triglochin maritimaArrow-grass · Sea Arrow-grass · Seaside Arrow-grass · Seaside Arrowgrass
- Trillium albidumFreeman's Trillium · Giant White Wakerobin · Sweet Trillium
- Trillium grandiflorumLarge-flower Trillium · Great White Trillium · Large White Trillium
- Trillium nivaleDwarf White Trillium · Snow Trillium · Snow Wakerobin
- Trillium ovatumCoast Trillium · Coast Wakerobin · Pacific Trillium
- Trillium pusillumTexas Trillium · Dwarf Trillium · Dwarf Wakerobin
- Trillium tschonoskiiA Pearl on Head · Mountain Woods Trillium · Pointed-petal Trillium
- Trillium undulatumPainted Trillium · Paint Trillium
- Tripleurospermum maritimumSea Mayweed · False Mayweed
- Tritonia securigeraPlain Tooth Triton · Tooth Triton
- Trochodendron aralioidesCartwheel Tree · Wheel Tree
- Trollius acaulisDwarf Globe Flower
- Trollius chinensisChinese Globeflower · Large-petal Globeflower · Northern Globe-flower
- Trollius europaeusAlpine Globeflower · Common Globeflower · European Globeflower
- Trollius ledebouriiLedebour Globeflower · Short-petal Globe-flower
- Trollius pumilusDwarf Globeflower
- Tropaeolum azureumBlue Nasturtium
- Tropaeolum pentaphyllumLadies' Legs
- Tropaeolum polyphyllumWreath Nasturtium
- Tropaeolum sessilifoliumNasturtium
- Tropaeolum speciosumChilean Flame Creeper · Flame Nasturtium · Scottish Flameflower
- Tsuga canadensisBlack Hemlock · Canada Hemlock · Canadian Hemlock · Eastern Hemlock
- Tulbaghia galpinii
- Tulipa chrysanthaMountain Tulip
- Tulipa clusianaLady Tulip
- Tulipa sprengeriSprenger's Tulip
- Tulipa tardaLate Tulip · Tardy Tulip
- Tulipa turkestanicaTurkestan Tulip
- Tussilago farfaraColt's-foot · Coltsfoot
U
- Ulmus glabraWych Elm
- Umbilicus rupestrisNavelwort · Wall Pennywort
- Ungernia victorisAmonkora
- Urochloa dictyoneuraCreeping Signal Grass · Creeping False Paspalum
- Urtica membranaceaMediterranean Nettle
- Urtica piluliferaRoman Nettle
- Uvularia grandifloraBellwort · Large-flowered Bellwort · Largeflower Bellwort
V
- Vaccinium macrocarponAmerican Cranberry · Cramberry · Cranberry
- Vaccinium membranaceumMontana Huckleberry · Siskiyou Mountain Huckleberry · Black Huckleberry · Thinleaf Huckleberry
- Vaccinium myrtillusBilberry · Blaeberry · European Blueberry · Whortleberry
- Vaccinium nummulariaCoin Whortleberry · Nummularia-like Blueberry
- Vaccinium uliginosumAlpine Blueberry · Bog Bilberry · Bog Blueberry
- Vaccinium vitis-idaeaCowberry · Lowbush Cranberry · Redberry · Lingonberry
- Valeriana rubraBovisand-sailor · Jupiter's Beard · Pretty Betsy · Red Valerian
- Veratrum californicumCalifornia Corn Lily · California False Hellebore · California Veratrum · Corn Lily
- Verbascum blattariaMoth Mullein · White Moth Mullein · White Mullein
- Verbascum phoeniceumPurple Mullein
- Verbena hastataAmerican Blue Vervain · American Vervain · Blue Vervain · Swamp Verbena
- Verbena macdougaliiMacDougal Verbena · Macdougal's Vervain · New Mexico Vervain
- Veronica aphyllaLargeflower Speedwell · Leafless-stemmed Speedwell
- Veronica bellidioidesViolet Speedwell · Dwarf Blue Speedwell
- Veronica besseyaAlpine Kittentails
- Veronica caespitosaTufted Speedwell
- Veronica chathamicaChatham Island Koromiko
- Veronica fruticansRock Speedwell · Woodystem Speedwell
- Veronica fruticulosaRose Mountain Speedwell · Shrubby-stalked Speedwell
- Veronica linifolia
- Veronica lyalliiLyall's Parahebe · Lyall's Speedwell
- Veronica nipponicaHime-kuwagata
- Veronica nummulariaPyrenean Speedwell
- Veronica paysoniiFeatherleaf Kittentails
- Veronica ponaeSpiked Pyrenean Speedwell
- Veronica serpyllifoliaThyme Leaved Speedwell · Thyme Speedwell · Thyme-leaf Speedwell · Thymeleaf Speedwell
- Veronica tauricolaMezla Mavişi
- Veronicastrum virginicumBlackroot · Bowman's-root · Culver's Root
- Viburnum acerifoliumArrow-wood · Dockmackie · Mapleleaf Viburnum
- Viburnum burkwoodiiBurkwood's Viburnum
- Viburnum carlesiiKorean Spice Viburnum · Koreanspice Viburnum
- Viburnum dentatumArrow-wood · Arrow-wood Viburnum · Southern Arrow-wood · Southern Arrowwood
- Viburnum dilatatumLinden Arrowwood · Linden Viburnum
- Viburnum lantanaWayfaring Tree · Wayfarer
- Viburnum opulusCrampbark · European Cranberrybush · European Cranberry Viburnum
- Viburnum rhytidophyllumLeatherleaf Arrowwood · Wrinkled Viburnum · Leatherleaf Viburnum
- Viburnum sargentiiAsian Guelder Rose
- Viburnum setigerumTea Viburnum · Tea-leaf Viburnum
- Viburnum sieboldiiSiebold's Arrowwood · Siebold's Viburnum
- Viburnum trilobumAmerican Guelder-rose · American Cranberrybush
- Viola aduncaBlue Violet · Rocky Mountain Violet · Daisy-leaved Violet · Hookedspur Violet
- Viola arborescensShrubby Violet
- Viola caninaDog Violet · Heath Dog-violet · Heath Violet
- Viola cuneataWedgeleaf Violet · Northern Two-eyed Violet · Wedge-leaved Violet
- Viola glabellaPioneer Violet · Smooth Yellow Violet · Smooth Yellow Woodland Violet
- Viola nuttalliiNuttall's Violet · Nuttall's Yellow Violet · Yellow Prairie Violet
- Viola tricolorEuropean Wild Pansy · Heartsease · Johnny Jumpup
- Viscaria alpinaAlpine Campion · Alpine Catchfly · Alpine Pink
- Viscaria vulgarisSticky Catchfly · Clammy Campion
- Vitex agnus-castusChaste Tree · Chasteberry · Lilac Chastetree
- Vitis viniferaCommon Grapevine · European Grape · European Wine Grape · Wine Grape
W
- Wahlenbergia congesta
- Wahlenbergia gloriosaRoyal Bluebell
- Waldsteinia fragarioidesBarren Strawberry · Appalachian Barren Strawberry
- Washingtonia filiferaAmerican Cotton Palm · California Fan Palm · California Washingtonia
- Weigela floridaOld Fashioned Weigela · Old-fashion Weigela · Weigela · Oldfashioned Weigela
- Wisteria sinensisChinese Wisteria · Chinese-glycine
- Withania somniferaIndian Ginseng · Poison Gooseberry · Poisonous Gooseberry · Withania
- Wulfenia carinthiacaCow's Footstep
- Wyethia amplexicaulisMule's Ear Wyethia · Mule-ears · Northern Mule's Ears
- Wyethia arizonicaArizona Mule's-ears · Arizona Mule-ears
- Wyethia helianthoidesSunflower Mule-ears · White Mule's-ears
- Wyethia sagittataArrowleaf Balsamroot
X
- Xeranthemum annuumImmortelle · Annual Everlasting
- Xeronema callistemonPoor Knights Lily
- Xerophyllum asphodeloidesTurkey Beard · Beartongue · Eastern Turkeybeard
- Xylanthemum pamiricum
Y
- Yucca baileyiAlpine Yucca · Bailey's Yucca · Navajo Yucca
- Yucca filamentosaAdam's Needle · Bear Grass · Needle-palm
- Yucca glaucaBeargrass · Great Plains Yucca · Spanish Bayonet · Soapweed Yucca
Z
- Zaluzianskya capensisNight Phlox
- Zantedeschia aethiopicaAltar-lily · Arum Lily · Arun Lily · Calla Lily
- Zea maysCorn · Indian Corn · Maize
- Zephyranthes araucanaAraucanian Rain Lily
- Zephyranthes atamascoAtamasco Lily · Rain Lily
- Zephyranthes elwesii
- Zephyranthes roseaCuban Zephyrlily · Fairy-lily · Rosy Rain Lily
- Zephyranthes tubispathaRio Grande Copperlily
- Zizia apteraHeart-leaf Alexanders · Heart-leaf Golden Alexanders · Heart-leaved Alexanders · Meadow Zizia
- Zizia aureaGolden Alexander · Golden Alexanders · Golden Zizia
- Ziziphora clinopodioides subsp. bungeanaBlue Mint Bush
- Zygophyllum atriplicoidesOrache-leaved Bean-caper