Gahnia R.J.Forst. & G.Forst.

Leaves with a ligule. Lower flower abortive or male Gahnia

Spikelets with 3 flowers; an apparently terminal bisexual one with a fertile and a male flower below it

Sterile glumes fewer than 10, the lowest ones mostly more than half as long as the spikelet

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Bracts subtending the lower spikelets long-awned; lower bracts of the cluster 3–4 times as long as the cluster. Clusters of spikelets erect, compact; spikelets almost sessile. Stamens 4. Nut oblong. Culms up to 1 m high. Leaves usually as long as the culm, 1–2 mm wide, channelled. Blue Mts Damp places Gahnia filifolia

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Bracts subtending the spikelets short-awned or acute to acuminate; the lower ones less than half as long as the cluster