Acianthus R.Br.

Labellum with 2 well developed basal glands Acianthus
Sepals long-filiform; the dorsal sepal up to 40 mm long. Stems 6–16 cm high. Flowers 1–6, reddish-purple. Chiefly coast. Sandy soils. Fl. July–Sept. Mayfly Orchids Acianthus caudatus
Sepals not long-filiform, up to 20 mm long. Perianth brown, green or pinkish