Acianthus R.Br.

Labellum with 2 well developed basal glands Acianthus

Sepals not long-filiform, up to 20 mm long. Perianth brown, green or pinkish

Petals reflexed against the ovary. Column prominently exserted.

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Flowers 8–12 mm long, green to pink. Labellum up to 5 mm long. Plant up to 20 cm high. Widespread. Open forest and margins of RF. Fl. autumn–winter. Gnat Orchid Acianthus pusillus

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Flowers 12–16 mm long, purplish. Labellum 5 mm long or longer. Plant 6–30 cm high. Flowers 1–10. Perianth usually pale reddish-brown, sometimes green, up to 20 mm long. Widespread. Fl. May–Sept. Mosquito Orchid Acianthus exsertus