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Olsynium douglasii

Douglas' Blue-eyed-grass · Douglas' Grass-widow · Douglas' Olsynium · Douglas' Grasswidow

Family IridaceaeGenus Olsynium

Magenta-pink flowers with pointed tepals and orange anthers, on short stems among grass and moss on a rocky slope.
FlowerIan PoelletCC BY-SA 4.0

About the plant

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

Habit
rhizomatous geophytePlants of the World Online
Habit
Perennial, Forb/herbPLANTS Database
Flower
Magenta-pinkRead from the photograph on this page
Native range
Canada, lower 48 statesPLANTS Database

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; Read from the photograph on this page — Deno's Garden.

Worth knowing

  • Grass-widow is the only Olsynium in North America; the other 11 species are South American. It was formerly placed in Sisyrinchium, and despite its common names it is not a grass. Wikipedia: Olsynium douglasii

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

Protocol 1

DerivedN. C. Deno, 1996

  1. Sow and cover

    Temperature: 70°F 21°C Light: light

No stated waiting before sowing.

0% germination.

Nothing germinated at 70.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Sisyrinchium p. 78Public domain
Show the original text
Sisyrinchium (Iridaceae). S. inflatum germ. 40(70% in 8th w) and none in 70L or 70D. A prior 3 m in 70D or 70L had no effect on the germination at 40.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Sisyrinchium p. 78. Quoted exactly. Every value on this card comes from this record; the step names come from a fixed list.

Protocol 2

DerivedN. C. Deno, 1993

Difficulty Low Rated by us, not by the source.

Start around February 8, 2027 for a May 3 last frost.

  1. Cold moist stratification

    Temperature: 40°F 4°C

Germination happens during step 1, in 56 days.

70% germination in 56 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Sisyrinchium p. 215Public domain
Show the original text
Sisyrinchium (lridaceae). Light and outdoor conditions should be tried. S. inflatum germ. 40(70% in 8th w) and none in 70D or 70L.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Sisyrinchium p. 215. 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

  1. Sow and cover

    Temperature: 70°F 21°C Light: dark

No stated waiting before sowing.

0% germination.

Nothing germinated at 70.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Sisyrinchium p. 215Public domain
Show the original text
Sisyrinchium (lridaceae). Light and outdoor conditions should be tried. S. inflatum germ. 40(70% in 8th w) and none in 70D or 70L.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Sisyrinchium p. 215. Quoted exactly. Every value on this card comes from this record; 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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