Genoplesium arrectum

Genoplesium arrectum is a terrestrial, perennial, deciduous, herb with an underground tuber and a single thin leaf 100–180 mm (4–7 in) long and fused to the flowering stem with the free part 10–15 mm (0.4–0.6 in) long. Between three and twenty dark purple flowers are crowded along a flowering stem 20–35 mm (0.8–1 in) tall and taller than the leaf. The flowers are about 6 mm (0.2 in) long, 3 mm (0.1 in) wide and are inverted so that the labellum is above the column rather than below it. The dorsal sepal is a broad egg shape, about 4 mm (0.2 in) long and 2.5 mm (0.1 in) wide with hairless edges and dark coloured bands. The lateral sepals are linear to lance-shaped, about 5 mm (0.2 in) long, 1 mm (0.04 in) wide, stiffly erect and more or less parallel to each other. The petals are a narrow egg shape, about 3.5 mm (0.1 in) long and 1 mm (0.04 in) wide with dark coloured bands and hairless edges. The labellum is elliptic to broadly egg-shaped, about 3 mm (0.1 in) long, 2 mm (0.08 in) wide, thick and fleshy with coarse hairs on its edges. There is a narrow egg-shaped callus in the centre of the labellum and extending three-quarters of the way to its tip. Flowering occurs in December and January.

Genoplesium arrectum grows in grassland and grassy forest at altitudes above 900 m (3,000 ft) in north-eastern Victoria and in the Australian Capital Territory.