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Oreoxis humilis

Pikes Peak spring-parsley

Family ApiaceaeGenus Oreoxis

Also published as Cymopterus humilis. You are in the right place.

Domed heads of tiny yellow flowers on short stalks, among ferny green leaves and last year's bleached grass.
FlowerSteve Olson, USFS botanist per [1]Public domain

Worth knowing

  • Pikes Peak spring-parsley, now Oreoxis humilis, is known only from around Pikes Peak in Colorado, in three occurrences totalling about 4,240 plants. Building and maintenance work on the Pikes Peak Highway threatens it. Wikipedia: Oreoxis humilis

This source reports 4 treatments. All are shown.

Protocol 1

DerivedN. C. Deno, 1998

Difficulty High Rated by us, not by the source.

Start around January 17, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on January 16, 2026.

  1. Warm moist stratification

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

  2. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  3. Warm moist stratification

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

  4. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

about 12 months from start to sowing. Then 84 days to germinate.

25% germination in 84 days.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Aletes p. 11Public domain
Show the original text
Aletes (Apiaceae). A. humilis germ. 40-70D(1/5 in 11th w) and 70L-40-70L- 40(1/4 in 12th w) and none in 70D, 70 GA-3, or OT.
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Aletes p. 11. 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, 1998

Difficulty High Rated by us, not by the source.

Start around July 23, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on July 22, 2026.

  1. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  2. Warm moist stratification

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

about 6 months from start to sowing. Then 77 days to germinate.

20% germination in 77 days.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Aletes p. 11Public domain
Show the original text
Aletes (Apiaceae). A. humilis germ. 40-70D(1/5 in 11th w) and 70L-40-70L- 40(1/4 in 12th w) and none in 70D, 70 GA-3, or OT.
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Aletes p. 11. 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, 1998

  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 Supplement — N. C. Deno, 1998 · 2nd Supplement, Aletes p. 11Public domain
Show the original text
Aletes (Apiaceae). A. humilis germ. 40-70D(1/5 in 11th w) and 70L-40-70L- 40(1/4 in 12th w) and none in 70D, 70 GA-3, or OT.
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Aletes p. 11. Quoted exactly. Every value on this card comes from this record; the step names come from a fixed list.

Protocol 4

DerivedN. C. Deno, 1998

Difficulty Very high Rated by us, not by the source.

  1. Sow outdoors and leave it

    Nothing germinated outdoors.

No stated waiting before sowing.

0% germination.

This source doesn't state how long.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Aletes p. 11Public domain
Show the original text
Aletes (Apiaceae). A. humilis germ. 40-70D(1/5 in 11th w) and 70L-40-70L- 40(1/4 in 12th w) and none in 70D, 70 GA-3, or OT.
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Aletes p. 11. 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.

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