Deno’s GardenMy Garden

Corydalis cheilanthifolia

Fern-leaved Corydalis · Fern-leaf Corydalis

Family PapaveraceaeGenus Corydalis

Upright spikes of yellow tubular flowers rising from rosettes of finely divided fern-like leaves
The whole plantPipiPublic domain

About the plant

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

Habit
biennial or perennialPlants of the World Online
Flower
Pale yellow, bright yellowFlora of China
Native range
China North-Central, China South-CentralGBIF 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; Flora of China — Wu Zhengyi, Peter H. Raven and Hong Deyuan (eds.); GBIF Backbone Taxonomy — Global Biodiversity Information Facility.

Worth knowing

This source reports two treatments. Both are shown.

Protocol 1

DerivedN. C. Deno, 1993

Difficulty Moderate Rated by us, not by the source.

Start around December 12, 2026 for a May 3 last frost.

  1. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

    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 24 days.

58% germination in 3–24 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Corydalis p. 125Public domain
Show the original text
Corydalis (Fumaraceae). Seeds of the monocarpic species ( C. cheilanthifolia germ. 70(2%)-40(58% in 3-24 d) and 40-70(17% in 10-15d)- 40-70. Note the strange patterns. All DS seed rotted and this is a fatal treatment.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Corydalis p. 125. 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 High Rated by us, not by the source.

Start around December 21, 2026 for a May 3 last frost.

  1. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  2. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

  3. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  4. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

Steps after step 2 run on after germination.

about 3 months from start to step 2. Germination happens during step 2, in 15 days.

17% germination in 10–15 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Corydalis p. 125Public domain
Show the original text
Corydalis (Fumaraceae). Seeds of the monocarpic species ( C. cheilanthifolia germ. 70(2%)-40(58% in 3-24 d) and 40-70(17% in 10-15d)- 40-70. Note the strange patterns. All DS seed rotted and this is a fatal treatment.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Corydalis p. 125. 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

Add to My Garden

View species page