Ant Orchid

Chiloglottis formicifera is a terrestrial, perennial, deciduous, herb with two leaves 30–60 mm (1–2 in) long and 15–25 mm (0.6–1 in) wide. A single greenish or reddish flower 12–16 mm (0.5–0.6 in) long and 6–8 mm (0.2–0.3 in) wide is borne on a flowering stem 60–100 mm (2–4 in) high. The dorsal sepal is spatula-shaped, 10–12.5 mm (0.4–0.5 in) long and about 3 mm (0.1 in) wide. The lateral sepals are 9–10 mm (0.35–0.39 in) long, about 0.7 mm (0.03 in) wide and erect at the base then curve downwards. There is a glandular tip about 0.5 mm (0.02 in) long on the end of all three sepals. The petals are lance-shaped with the narrower end towards the base, 8–10 mm (0.3–0.4 in) long, about 3 mm (0.1 in) wide and turned strongly downwards. The labellum is diamond-shaped, 7–10 mm (0.3–0.4 in) long and 6–7.5 mm (0.2–0.3 in) wide with a narrow, shiny black, ant-like callus covering most of its upper surface. Flowering occurs from August to November.

Common ant orchid grows in moist places in forest between the Northern Tablelands and Nowra. There is a single historical record from Kaitaia in New Zealand.