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Purshia mexicana

Mexican Cliffrose

Family RosaceaeGenus Purshia

A white five-petalled flower with a tuft of yellow stamens, at the tip of a twig crowded with small sticky green buds and lobed leaves.
FlowerAndrey Zharkikh from Salt Lake City, USACC BY 2.0

About the plant

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

Habit
treePlants of the World Online
Habit
Perennial, Shrub, TreePLANTS Database
Flower
WhiteRead from the photograph on this page
Native range
Mexico Northeast, Mexico Northwest, Mexico SouthwestGBIF 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; Read from the photograph on this page — Deno's Garden; GBIF Backbone Taxonomy — Global Biodiversity Information Facility.

This source reports three treatments. All are shown.

Protocol 1

DerivedN. C. Deno, 1996

Difficulty Low 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.

88% germination in 14–28 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Purshia p. 69Public domain
Show the original text
Purshia (Rosaceae). P. mexicana v. stansburyana germ. 70L(88% in 2-4 w), 70 GA-3(30%), 70D{46% in 3-8 w), and 40(61% in 7-12 W)-70(15%). Winter temperatures killed all the seed in OT. DS for 6 m had littie effect.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Purshia p. 69. 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 March 15, 2027 for a May 3 last frost.

  1. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  2. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

    15 germinated in this phase.

Steps after step 1 run on after germination.

Germination happens during step 1; time not stated, 21 days assumed.

61% germination.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Purshia p. 69Public domain
Show the original text
Purshia (Rosaceae). P. mexicana v. stansburyana germ. 70L(88% in 2-4 w), 70 GA-3(30%), 70D{46% in 3-8 w), and 40(61% in 7-12 W)-70(15%). Winter temperatures killed all the seed in OT. DS for 6 m had littie effect.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Purshia p. 69. 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 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. Germination time not stated; 21 days assumed.

30% germination.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Purshia p. 69Public domain
Show the original text
Purshia (Rosaceae). P. mexicana v. stansburyana germ. 70L(88% in 2-4 w), 70 GA-3(30%), 70D{46% in 3-8 w), and 40(61% in 7-12 W)-70(15%). Winter temperatures killed all the seed in OT. DS for 6 m had littie effect.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Purshia p. 69. 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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