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Osbeckia stellata

Starry Osbeckia

Family MelastomataceaeGenus Osbeckia

Bright magenta four-petalled flowers with yellow stamens and bristly red buds, among hairy, veined leaves
FlowerAshwin SrinivasanCC BY 4.0
A plate of a shrub with strongly ribbed leaves and broad pink four-petalled flowers rising from bristly buds, with dissections at the side.
IllustrationM.S. del, J.N.Fitch, lith.Public domain

About the plant

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

Habit
shrubPlants of the World Online
Flower
Pink, purpleFlora of China
Native range
Assam, Cambodia, China South-Central, China Southeast, East Himalaya, India 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; Flora of China — Wu Zhengyi, Peter H. Raven and Hong Deyuan (eds.); GBIF Backbone Taxonomy — Global Biodiversity Information Facility.

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 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.

70% germination in 7–21 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Osbeckia p. 183Public domain
Show the original text
Osbeckia (Melastomaceae). 0. stellata had germination promoted by light as shown by 70L(70% in 1-3 w) and 70D(15% in 2nd w). A prior 3 m at 40 was injurious as shown by 40-70L(none) and 40-70D(4%).
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Osbeckia p. 183. 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 22, 2027 for a May 3 last frost.

  1. Sow and cover

    Temperature: 70°F 21°C Light: dark

No stated waiting before sowing. Then 14 days to germinate.

15% germination in 14 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Osbeckia p. 183Public domain
Show the original text
Osbeckia (Melastomaceae). 0. stellata had germination promoted by light as shown by 70L(70% in 1-3 w) and 70D(15% in 2nd w). A prior 3 m at 40 was injurious as shown by 40-70L(none) and 40-70D(4%).
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Osbeckia p. 183. 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 December 15, 2026 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 Light: dark

about 3 months from start to step 2. Germination happens during step 2; time not stated, 21 days assumed.

4% germination.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Osbeckia p. 183Public domain
Show the original text
Osbeckia (Melastomaceae). 0. stellata had germination promoted by light as shown by 70L(70% in 1-3 w) and 70D(15% in 2nd w). A prior 3 m at 40 was injurious as shown by 40-70L(none) and 40-70D(4%).
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Osbeckia p. 183. 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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