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Hymenosporum flavum

Australian Frangipani · Native Frangipani · Queensland Frangipani

Family PittosporaceaeGenus Hymenosporum

Golden-yellow flowers with slender tubes and spreading lobes, opening along a woody stem
FlowerJan Smith from Brisbane, AustraliaCC BY 2.0

About the plant

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

Habit
shrub or treePlants of the World Online
Flower
Golden, yellowWikipedia
Native range
New Guinea, New South Wales, QueenslandGBIF 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; Wikipedia — Wikipedia contributors; GBIF Backbone Taxonomy — Global Biodiversity Information Facility.

Worth knowing

  • The only species in its genus. Called native frangipani, but not closely related to frangipani. Hymenosporum is Greek for membrane seed, for its winged seeds; flavum means yellow. Wikipedia: Hymenosporum

This source reports two treatments. Both are shown.

Protocol 1

DerivedN. C. Deno, 1996

Difficulty Low Rated by us, not by the source.

Start around August 27, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on August 26, 2026.

  1. Dry storage

    Duration: 180 daysTemperature: 70°F 21°C

  2. Sow and cover

    Temperature: 70°F 21°C Light: light

about 6 months from start to sowing. Then 42 days to germinate.

83% germination in 21–42 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Hymenosporum p. 49Public domain
Show the original text
Hymenosporum (Pittosporaceae). H. flavum germ. 70L(83% in 3-6 w) 70 GA-3(50% in 4th w), and 70D{9%) using seeds DS 6 m. Seeds that had been given 6 m of other treatments germ. 3/4 in 4th w after treating with GA-3.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Hymenosporum p. 49. 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 September 10, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on September 9, 2026.

  1. Dry storage

    Duration: 180 daysTemperature: 70°F 21°C

  2. Gibberellic acid soak

  3. Sow and cover

    Temperature: 70°F 21°C

about 6 months from start to sowing. Then 28 days to germinate.

50% germination in 28 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Hymenosporum p. 49Public domain
Show the original text
Hymenosporum (Pittosporaceae). H. flavum germ. 70L(83% in 3-6 w) 70 GA-3(50% in 4th w), and 70D{9%) using seeds DS 6 m. Seeds that had been given 6 m of other treatments germ. 3/4 in 4th w after treating with GA-3.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Hymenosporum p. 49. 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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