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Fritillaria glauca

Siskiyou Fritillaria · Siskiyou Fritillary · Siskiyou Missionbells

Family LiliaceaeGenus Fritillaria

A nodding yellow bell flecked with red-brown, above a few gray-green leaves on gravel
FlowerJohn GameCC BY 2.0

About the plant

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

Habit
bulbous geophytePlants of the World Online
Habit
Perennial, Forb/herbPLANTS Database
Flower
Purplish, greenishFlora of North America
Native range
California, OregonGBIF 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

This source reports three treatments. All are shown.

Protocol 1

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.

100% germination in 42–56 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Fritillaria p. 144Public domain
Show the original text
Fritillaria (Liliaceae). This genus germ. primarily at 40. Sometimes this had to be preceded by a cycle at 70 making the species a 70-40 germinator. The seedlings did not always develop, and it is probable that this was the result of shifting them to 70 too suddenly. More study is needed on this problem. Some species showed intolerance to DS, particularly F. glauca germ. 40(100% in 6-8 w), 70-40(60% in 6-8 w), and 24% in February and March from seed placed outdoors in November.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Fritillaria p. 144. 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 November 10, 2026 for a May 3 last frost.

  1. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

  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 56 days.

60% germination in 42–56 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Fritillaria p. 144Public domain
Show the original text
Fritillaria (Liliaceae). This genus germ. primarily at 40. Sometimes this had to be preceded by a cycle at 70 making the species a 70-40 germinator. The seedlings did not always develop, and it is probable that this was the result of shifting them to 70 too suddenly. More study is needed on this problem. Some species showed intolerance to DS, particularly F. glauca germ. 40(100% in 6-8 w), 70-40(60% in 6-8 w), and 24% in February and March from seed placed outdoors in November.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Fritillaria p. 144. 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.

Sow around November 2027 — a date the source gives, not one counted back from a May 3 last frost. Too late for spring 2027 — that needed starting on November 2026.

  1. Sow outdoors and leave it

    Sown outdoors in November; up in February and March.

No stated waiting before sowing. Then 90 days to germinate.

24% germination in 90 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Fritillaria p. 144Public domain
Show the original text
Fritillaria (Liliaceae). This genus germ. primarily at 40. Sometimes this had to be preceded by a cycle at 70 making the species a 70-40 germinator. The seedlings did not always develop, and it is probable that this was the result of shifting them to 70 too suddenly. More study is needed on this problem. Some species showed intolerance to DS, particularly F. glauca germ. 40(100% in 6-8 w), 70-40(60% in 6-8 w), and 24% in February and March from seed placed outdoors in November.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Fritillaria p. 144. 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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