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Gahnia clarkei

Tall Saw-sedge

Family CyperaceaeGenus Gahnia

A large sedge of long arching leaves with a dark drooping seed panicle, on a sandy bank
The whole plantJohn Tann from Sydney, AustraliaCC BY 2.0

About the plant

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

Habit
perennialPlants of the World Online
Flower
Black, brownishWikipedia

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.

Protocol

DerivedN. C. Deno, 1998

Difficulty Low Rated by us, not by the source.

  1. Sow and cover

    Temperature: 70°F 21°C Light: light

No stated waiting before sowing. Then 126 days to germinate.

99% germination in 21–126 days.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Gahnia p. 35Public domain
Show the original text
Gahnia (Cyperaceae). Both species had an absolute light requirement. Both samples were kept in 70L for longer than the usual 3 m because germination was continuing. Any treatment prior to placing in 70L either had no effect or was deleterious. G. clarkei germ. 70L(99% in 3-18 w). A prior 3 m at 40, 70D-40, 70D-40-70D-40, or 40-70D-40 had little effect. None germ. in any dark treatments including OS and GA-3. Seeds DS 1 y germ. 70L{88% in 3rd w) similar to fresh seeds.
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Gahnia p. 35. 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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