Cat. Austral. Orchid. (Austral. Orchid Res.) 1: 120 (1989) APNI
Threat status:EPBC: vulnerable (VU); Victoria: endangered (e)
Flowering plant to 25 cm tall, stem leaves 2–5, closely sheathing. Rosette leaves 8–12, elliptic to oblong, 1.5–3 cm long, 6–12 mm wide. Flowers 1–10, porrect, 3–3.5 cm long, reddish-brown and green with transparent areas in the petals and galea; dorsal sepal with an upcurved filiform point 9–12 mm long; lateral sepals deflexed, conjoined part broadly ovate in outline when flattened, much wider than galea, shallowly concave, margins slightly incurved, densely ciliate, free points filamentous, 15–20 mm long, divergent; petals with a well-developed proximal flange. Labellum ovate, 5–7 mm long, c. 2 mm wide, brown, thick; marginal hairs 6–10 in pairs, 1–3 mm long, white, forward-pointing; basal lobe thick, with numerous short hairs. Flowers Oct.–Nov.
Also SA. Grows in mallee scrub in far north-western Victoria.
There is some doubt if the Victorian specimens are in fact Pterostylis arenicola given their somewhat wider lateral sepals and more pointed labellum.