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Clematis coactilis

Erect Silky Leather-flower · Virginia White-hair Leather-flower · Curly-heads · Virginia Whitehair Leather Flower

Family RanunculaceaeGenus Clematis

A small cream urn-shaped flower half hidden among broad rain-wet leaves
FlowerSteve LawCC 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
Habit
Perennial, Forb/herb, SubshrubPLANTS Database
Flower
Pale yellowFlora of North America
Native range
VirginiaGBIF 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; PLANTS Database — USDA NRCS; Flora of North America — Flora of North America Editorial Committee; GBIF Backbone Taxonomy — Global Biodiversity Information Facility.

Worth knowing

  • Virginia white-hair leather flower is endemic to western Virginia, reported from only seven counties. Unlike many clematis, it is not a vine but an upright plant up to 45 cm tall, covered in silky, bristly or woolly hairs. Wikipedia: Clematis coactilis

Two sources report three treatments between them. All are shown.

Protocol 1

DerivedN. C. Deno, 1998

Difficulty High Rated by us, not by the source.

Start around January 18, 2027 for a May 3 last frost.

  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

    1/5 germinated in this phase.

Steps after step 1 run on after germination.

Germination happens during step 1, in 77 days.

20% germination in 77 days.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Clematis p. 25Public domain
Show the original text
Clematis (Ranunculaceae). C. coactilis germ. 70D(1/5 in 11th w)-40- 70D(1/5 in 11th w), 70L(1/4 in 10th w), and 70 GA-3(all 4 rotted). The cotyledons opened a month after germination.
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Clematis p. 25. 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, 1996

Difficulty Moderate Rated by us, not by the source.

Start around January 18, 2027 for a May 3 last frost.

  1. Sow and cover

    Temperature: 70°F 21°C Light: dark

No stated waiting before sowing. Then 77 days to germinate.

33% germination in 77 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Clematis p. 31Public domain
Show the original text
Clematis (Ranunculaceae). C. coactilis germ. 70D(1/3 in 11th w) and 70L(1/4 in 10th w). All 4 rotted in 70 GA-3. The cotyledons are slow to expand and did not open completely until 4 w after germination.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Clematis p. 31. 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, 1996

Difficulty High Rated by us, not by the source.

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

  1. Sow and cover

    Temperature: 70°F 21°C Light: light

No stated waiting before sowing. Then 70 days to germinate.

25% germination in 70 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Clematis p. 31Public domain
Show the original text
Clematis (Ranunculaceae). C. coactilis germ. 70D(1/3 in 11th w) and 70L(1/4 in 10th w). All 4 rotted in 70 GA-3. The cotyledons are slow to expand and did not open completely until 4 w after germination.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Clematis p. 31. 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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