Lepyrodia R.Br.

Culms with circular internal air cavities. Perianth segments equal Lepyrodia
Culms with neither leaf sheath nor node except at the base (except rarely one leaf sheath), very slender, unbranched. Flowers in a spike-like panicle c. 2 cm long. Widespread. Heath and DSF Lepyrodia anarthria
Culms with leaf sheaths. Flowers in a narrow panicle