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Anemonastrum protractum

Elongated Anemone

Family RanunculaceaeGenus Anemonastrum

Three white flowers with yellow centers on a stem trailing across pale limestone rubble, its leaves cut into narrow fingers.
Floweryakovlev.alexey from Moscow, RussiaCC BY-SA 2.0

About the plant

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

Habit
perennialPlants of the World Online
Flower
WhiteRead from the photograph on this page
Native range
Afghanistan, China South-Central, Kazakhstan, Kirgizstan, Pakistan, Tadzhikistan and elsewhereGBIF 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; Read from the photograph on this page — Deno's Garden; 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 February 15, 2027 for a May 3 last frost.

  1. Sow and cover

    Temperature: 70°F 21°C

No stated waiting before sowing. Then 49 days to germinate.

50% germination in 35–49 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Anemonastrum p. 94Public domain
Show the original text
Anemonastrum (Ranunculaceae). A. protractum sown outdoors in May germ. the-following April. Only the two cotyledons develop the first year. A second sample of 8 seeds was divided. The loose brown seed coats were removed from 4 and these germ. 70(2/4 in 5-7 w) whereas the controls germ. 70D-40-70D(1/3 in 2nd w) and 40-70(1/10 in 5th w). The data is too meagre to draw the conclusion that the seed coat contains an inhibitor. A.. speciosum seed all rotted. -
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Anemonastrum p. 94. 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 September 24, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on September 23, 2026.

  1. Warm moist stratification

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

  2. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  3. Warm moist stratification

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

about 6 months from start to step 3. Germination happens during step 3, in 14 days.

33% germination in 14 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Anemonastrum p. 94Public domain
Show the original text
Anemonastrum (Ranunculaceae). A. protractum sown outdoors in May germ. the-following April. Only the two cotyledons develop the first year. A second sample of 8 seeds was divided. The loose brown seed coats were removed from 4 and these germ. 70(2/4 in 5-7 w) whereas the controls germ. 70D-40-70D(1/3 in 2nd w) and 40-70(1/10 in 5th w). The data is too meagre to draw the conclusion that the seed coat contains an inhibitor. A.. speciosum seed all rotted. -
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Anemonastrum p. 94. 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 December 1, 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

about 3 months from start to step 2. Germination happens during step 2, in 35 days.

10% germination in 35 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Anemonastrum p. 94Public domain
Show the original text
Anemonastrum (Ranunculaceae). A. protractum sown outdoors in May germ. the-following April. Only the two cotyledons develop the first year. A second sample of 8 seeds was divided. The loose brown seed coats were removed from 4 and these germ. 70(2/4 in 5-7 w) whereas the controls germ. 70D-40-70D(1/3 in 2nd w) and 40-70(1/10 in 5th w). The data is too meagre to draw the conclusion that the seed coat contains an inhibitor. A.. speciosum seed all rotted. -
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Anemonastrum p. 94. 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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