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Wyethia arizonica

Arizona Mule's-ears · Arizona Mule-ears

Family AsteraceaeGenus Wyethia

A yellow daisy with broad pointed rays and a domed center of tight golden florets, above long dark leaves.
FlowerPatrick Alexander from Las Cruces, NMCC0

About the plant

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

Habit
Perennial, Forb/herbPLANTS Database
Flower
YellowWikipedia
Native range
Arizona, Colorado, New Mexico, UtahGBIF Backbone Taxonomy

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

Sources: PLANTS Database — USDA NRCS; Wikipedia — Wikipedia contributors; GBIF Backbone Taxonomy — Global Biodiversity Information Facility.

This source reports three treatments. All are shown.

Protocol 1

DerivedN. C. Deno, 1993

Difficulty Moderate Rated by us, not by the source.

Start around January 25, 2027 for a May 3 last frost.

  1. Cold moist stratification

    Temperature: 40°F 4°C

    Seven of fifteen, over 5-10 weeks -- it germinates in the cold.

  2. Warm moist stratification

    Temperature: 70°F 21°C

    Five more of fifteen, in 1-3 days.

Germination happens during step 2, in 70 days.

47% germination in 35–70 days.

Seven seeds of fifteen in the cold, five more after the move. The best of three. Deno's samples were small and he does not call the GA-3 differences significant.

This source doesn't state how long step 1 lasts.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, WyethiaPublic domain
Show the original text
Wyethia (Asteraceae). Samples were small, and differences between GA'3 treated seeds and the controls are not regarded as significant. As with some other Asteraceae, GA-3 treatment did not significantly stimulate germination and in some species it killed the seed. W. arizonica germ. 70(2/12 in 3rd w) and 70D GA-3(7/18 in 3-20 d), and 40(7/15 in 5-10 w)-70(5/15 in 1-3 d).
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Wyethia. 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, 1993

Difficulty Moderate Rated by us, not by the source.

Start around March 16, 2027 for a May 3 last frost.

  1. Gibberellic acid soak

  2. Sow and cover

    Temperature: 70°F 21°C Light: dark

No stated waiting before sowing. Then 20 days to germinate.

39% germination in 3–20 days.

Seven seeds of eighteen. The only Wyethia here that GA-3 did not kill. Deno's samples were small and he does not call the GA-3 differences significant.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, WyethiaPublic domain
Show the original text
Wyethia (Asteraceae). Samples were small, and differences between GA'3 treated seeds and the controls are not regarded as significant. As with some other Asteraceae, GA-3 treatment did not significantly stimulate germination and in some species it killed the seed. W. arizonica germ. 70(2/12 in 3rd w) and 70D GA-3(7/18 in 3-20 d), and 40(7/15 in 5-10 w)-70(5/15 in 1-3 d).
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Wyethia. 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 3

DerivedN. C. Deno, 1993

Difficulty High Rated by us, not by the source.

Start around March 15, 2027 for a May 3 last frost.

  1. Sow and cover

    Temperature: 70°F 21°C

No stated waiting before sowing. Then 21 days to germinate.

17% germination in 21 days.

Two seeds of twelve sown warm and left alone. Deno's samples were small and he does not call the GA-3 differences significant.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, WyethiaPublic domain
Show the original text
Wyethia (Asteraceae). Samples were small, and differences between GA'3 treated seeds and the controls are not regarded as significant. As with some other Asteraceae, GA-3 treatment did not significantly stimulate germination and in some species it killed the seed. W. arizonica germ. 70(2/12 in 3rd w) and 70D GA-3(7/18 in 3-20 d), and 40(7/15 in 5-10 w)-70(5/15 in 1-3 d).
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Wyethia. 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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