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Thomasia quercifolia

Oak-leaved Thomasia

Family MalvaceaeGenus Thomasia

A small pink star-shaped flower held by a finger, among wavy, oak-like green leaves
FlowerEm LamondCC BY 4.0
A plate of a twiggy shrub with small oak-shaped lobed leaves and pink cup flowers with dark centers, opening from furry buds.
IllustrationBentham-Moxon Trust.; Curtis, William; Curtis's botanical magazine dedications, 1827-1927 : portraits and biographical notes.; Royal Botanic Gardens, Kew.; Stanley Smith Horticultural Trust.Public domain

About the plant

What it is and where it grows — not part of any germination protocol.

Habit
subshrubPlants of the World Online
Flower
Pink, mauveWikipedia
Native range
Western AustraliaGBIF Backbone Taxonomy

Toxicity is noted only where a source states it. No note here is not a finding of safety.

Sources: Plants of the World Online — Royal Botanic Gardens, Kew; Wikipedia — Wikipedia contributors; GBIF Backbone Taxonomy — Global Biodiversity Information Facility.

This source reports two treatments. Both are shown.

Protocol 1

DerivedN. C. Deno, 1998

Difficulty Moderate Rated by us, not by the source.

Start around December 15, 2026 for a May 3 last frost.

  1. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C Light: light

  2. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

about 3 months from start to step 2. Germination happens during step 2; time not stated, 21 days assumed.

36% germination.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Thomasia p. 65Public domain
Show the original text
Thomasia (Sterculiaceae). T. quercifolia seeds severahyears old germ. 70D(2% in 7th w)-40(20% in 4th w) and 70L-40(36% in Bth w). The seeds largely ' rotted in 70 GA-3 or 40.
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Thomasia p. 65. Quoted exactly. Every value on this card comes from this record, except the difficulty rating, which is ours; the step names come from a fixed list.

Protocol 2

DerivedN. C. Deno, 1998

Difficulty High Rated by us, not by the source.

Start around December 8, 2026 for a May 3 last frost.

  1. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C Light: dark

    2 germinated in this phase.

  2. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

about 3 months from start to step 2. Germination happens during step 2, in 28 days.

20% germination in 28 days.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Thomasia p. 65Public domain
Show the original text
Thomasia (Sterculiaceae). T. quercifolia seeds severahyears old germ. 70D(2% in 7th w)-40(20% in 4th w) and 70L-40(36% in Bth w). The seeds largely ' rotted in 70 GA-3 or 40.
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Thomasia p. 65. Quoted exactly. Every value on this card comes from this record, except the difficulty rating, which is ours; the step names come from a fixed list.

How each step is done, in Deno’s words, and what Verified and Derived mean.

Germination trials

Readers’ own records of sowing this species, published after review. Share your trial · All trials

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