Genoplesium stephensonii

Genoplesium stephensonii is a terrestrial, perennial, deciduous, herb with an underground tuber and a single cylindrical leaf 100–180 mm (3.9–7.1 in) long, sheathing the flowering stem with the free part 10–15 mm (0.39–0.59 in) long and about 2 mm (0.079 in) wide. Usually up to five, sometimes up to eight green flowers with pink to reddish markings are arranged along a flowering stem 110–200 mm (4.3–7.9 in) long. The flowers are 7–8 mm (0.28–0.31 in) long and about 5.5 mm (0.22 in) wide. As with others in the genus, the flowers are inverted so that the labellum is above the column rather than below it. The dorsal sepal is broadly egg-shaped and forms a hood over the column, 4.5–5.0 mm (0.18–0.20 in) long and about 3.5 mm (0.14 in) wide with red markings. The lateral sepals are linear, 5.0–5.5 mm (0.20–0.22 in) long, about 1.5 mm (0.059 in) wide, and spread apart but lack a humped base. The petals are egg-shaped, 4.3–4.6 mm (0.17–0.18 in) long and about 1.5 mm (0.059 in) wide with red edges and three red stripes along the centre. The labellum is egg-shaped, about 4.3 mm (0.17 in) long and 2.6 mm (0.10 in) wide with many short, pink to purplish hairs. There is a fleshy, dark red callus covering most of the labellum and extending nearly to its tip. Flowering usually occurs between November and February, but also depends on rainfall.

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