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Mentzelia nuda

Bractless Blazingstar · Goodmother · Stickleaf Mentzelia

Family LoasaceaeGenus Mentzelia

A cream flower with ten narrow petals and a spray of long white stamens over a yellow center, lying in dry grass.
FlowerIan D. MedeirosCC BY 4.0

About the plant

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

Habit
biennial or perennialPlants of the World Online
Habit
Biennial, Perennial, Forb/herbPLANTS Database
Flower
WhiteFlora of North America
Native range
Native to the 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; Flora of North America — Flora of North America Editorial Committee.

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 January 11, 2027 for a May 3 last frost.

  1. Cold moist stratification

    Temperature: 40°F 4°C

Germination happens during step 1, in 84 days.

70% germination in 21–84 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Mentzelia p. 178Public domain
Show the original text
Mentzelia (Loasaceae). Light reduced the percent germination. M. nuda germ. 40(70% in 3-12 w) and less in 70D(20%) and 70L(5%). Merendera (Llliaceae) Although samples were small, germination appears to occur only at 40 and a preliminary 3 m at 70 is beneficial.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Mentzelia p. 178. 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 High 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: dark

No stated waiting before sowing. Germination time not stated; 21 days assumed.

20% germination.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Mentzelia p. 178Public domain
Show the original text
Mentzelia (Loasaceae). Light reduced the percent germination. M. nuda germ. 40(70% in 3-12 w) and less in 70D(20%) and 70L(5%). Merendera (Llliaceae) Although samples were small, germination appears to occur only at 40 and a preliminary 3 m at 70 is beneficial.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Mentzelia p. 178. 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 Very high 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. Germination time not stated; 21 days assumed.

5% germination.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Mentzelia p. 178Public domain
Show the original text
Mentzelia (Loasaceae). Light reduced the percent germination. M. nuda germ. 40(70% in 3-12 w) and less in 70D(20%) and 70L(5%). Merendera (Llliaceae) Although samples were small, germination appears to occur only at 40 and a preliminary 3 m at 70 is beneficial.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Mentzelia p. 178. 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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