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Thalictrum petaloideum

Petaloid Meadow-rue

Family RanunculaceaeGenus Thalictrum

Fluffy clusters of small white flowers with many long stamens, above dark green leaves
FlowerСвятослав ВласенкоCC BY 4.0
An engraved plate of a plant with wide fans of small rounded leaflets on thin stalks, a flower head at the stem tip, and a mass of fibrous roots.
IllustrationCandolle, Augustin Pyramus de; Delessert, Benjamin; Turpin, P. J. F.Public domain

About the plant

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

Habit
perennialPlants of the World Online
Flower
WhiteFlora of China
Native range
Altay, Amur, Buryatiya, China North-Central, China South-Central, China Southeast 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; Flora of China — Wu Zhengyi, Peter H. Raven and Hong Deyuan (eds.); GBIF Backbone Taxonomy — Global Biodiversity Information Facility.

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 March 21, 2027 for a May 3 last frost.

  1. Sow and cover

    Temperature: 70°F 21°C

No stated waiting before sowing. Then 15 days to germinate.

51% germination in 12–15 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Thalictrum p. 220Public domain
Show the original text
Thalictrum (Ranunculaceae). Germination in this genus was found to be dramatically stimulated by GA-3. The seedlings are normal and healthy. This is a great benefit because otherwise germination is low and much extended in most of the species. In general DS is not tolerated. Light was not used in this genus. T. petaloideum germ. 70(51% in 12-15 d) and 40(3%)-70(32% in 2-4 w). This seed was received from Manchuria in April and had been DS for at least 6 m.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Thalictrum p. 220. 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 December 8, 2026 for a May 3 last frost.

  1. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

    3 germinated in this phase.

  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 28 days.

32% germination in 14–28 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Thalictrum p. 220Public domain
Show the original text
Thalictrum (Ranunculaceae). Germination in this genus was found to be dramatically stimulated by GA-3. The seedlings are normal and healthy. This is a great benefit because otherwise germination is low and much extended in most of the species. In general DS is not tolerated. Light was not used in this genus. T. petaloideum germ. 70(51% in 12-15 d) and 40(3%)-70(32% in 2-4 w). This seed was received from Manchuria in April and had been DS for at least 6 m.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Thalictrum p. 220. 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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