Deno’s GardenMy Garden

Calyptridium umbellatum

Mount Hood Pussypaws · Mount Hood Umbellate Pussypaws · Mt. Hood Pussy-paws

Family MontiaceaeGenus Calyptridium

Bright pink fluffy flower heads on short red stalks around a mat of small gray-green leaves among stones, with a centimeter scale
FlowerJason HollingerCC BY 2.0

About the plant

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

Habit
perennial or tuberous geophytePlants of the World Online
Flower
PinkRead from the photograph on this page
Native range
British Columbia, California, Colorado, Idaho, Mexico Northwest, Montana 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; Read from the photograph on this page — Deno's Garden; GBIF Backbone Taxonomy — Global Biodiversity Information Facility.

Two sources report 6 treatments between them. All are shown.

Protocol 1

DerivedN. C. Deno, 1996

Difficulty Moderate Rated by us, not by the source.

Start around March 15, 2027 for a May 3 last frost.

  1. Gibberellic acid soak

  2. Sow and cover

    Temperature: 70°F 21°C

No stated waiting before sowing. Then 21 days to germinate.

52% germination in 7–21 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Calyptridium p. 27Public domain
Show the original text
Calyptridium (Portulacaceae). C. umbellatum germ. 70L(12% in 1-4 w), 70 GA-3(52% in 1-3 w), 70D(none), and 40-70D{11% in 4-6 d). Outdoor treatment was largeiy fatal as with the above. Seeds DS 1 y and 2 y germ. 70L(6%) and 70D(none).
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Calyptridium p. 27. 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 High Rated by us, not by the source.

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

  1. Sow and cover

    Temperature: 70°F 21°C Light: light

No stated waiting before sowing. Then 28 days to germinate.

12% germination in 7–28 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Calyptridium p. 27Public domain
Show the original text
Calyptridium (Portulacaceae). C. umbellatum germ. 70L(12% in 1-4 w), 70 GA-3(52% in 1-3 w), 70D(none), and 40-70D{11% in 4-6 d). Outdoor treatment was largeiy fatal as with the above. Seeds DS 1 y and 2 y germ. 70L(6%) and 70D(none).
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Calyptridium p. 27. 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 Very high Rated by us, not by the source.

Start around March 16, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on March 15, 2026.

  1. Dry storage

    Duration: 365 daysTemperature: 70°F 21°C

  2. Sow and cover

    Temperature: 70°F 21°C Light: light

about 12 months from start to sowing. Germination time not stated; 21 days assumed.

6% germination.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Calyptridium p. 27Public domain
Show the original text
Calyptridium (Portulacaceae). C. umbellatum germ. 70L(12% in 1-4 w), 70 GA-3(52% in 1-3 w), 70D(none), and 40-70D{11% in 4-6 d). Outdoor treatment was largeiy fatal as with the above. Seeds DS 1 y and 2 y germ. 70L(6%) and 70D(none).
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Calyptridium p. 27. 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 4

DerivedN. C. Deno, 1993

Difficulty Moderate Rated by us, not by the source.

Start around March 15, 2027 for a May 3 last frost.

  1. Sow and cover

    Temperature: 70°F 21°C Light: light

No stated waiting before sowing. Then 21 days to germinate.

60% germination in 7–21 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Calyptridium p. 110Public domain
Show the original text
Calyptridium (Portulacaceae). C. umbellatum germ. best in 70L(60% in 1- 3 w) and none in 70D. Germination also occurs at 40(35% in 3rd w) in the dark. Interestingly, when this latter sample was shifted to 70 after the 3 m at 40, the half placed in light germ. an additional 46% whereas there was no further germination in the half kept in 70D. This curious situation needs further study.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Calyptridium p. 110. 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 5

DerivedN. C. Deno, 1993

Difficulty Moderate Rated by us, not by the source.

Start around March 15, 2027 for a May 3 last frost.

  1. Cold moist stratification

    Temperature: 40°F 4°C

Germination happens during step 1, in 21 days.

35% germination in 21 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Calyptridium p. 110Public domain
Show the original text
Calyptridium (Portulacaceae). C. umbellatum germ. best in 70L(60% in 1- 3 w) and none in 70D. Germination also occurs at 40(35% in 3rd w) in the dark. Interestingly, when this latter sample was shifted to 70 after the 3 m at 40, the half placed in light germ. an additional 46% whereas there was no further germination in the half kept in 70D. This curious situation needs further study.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Calyptridium p. 110. 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 6

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, Calyptridium p. 110Public domain
Show the original text
Calyptridium (Portulacaceae). C. umbellatum germ. best in 70L(60% in 1- 3 w) and none in 70D. Germination also occurs at 40(35% in 3rd w) in the dark. Interestingly, when this latter sample was shifted to 70 after the 3 m at 40, the half placed in light germ. an additional 46% whereas there was no further germination in the half kept in 70D. This curious situation needs further study.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Calyptridium p. 110. 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

Add to My Garden

View species page