About Pterostylis prasina (D.L.Jones) G.N.Backh.
Pterostylis prasina (D.L.Jones) G.N.Backh. is a terrestrial, perennial, deciduous herb that grows from an underground tuber. Non-flowering individuals produce a rosette of three to five dark green leaves, shaped from egg-like to lance-like. These leaves measure 7–50 mm long and 4–15 mm wide, and sit on a thin stalk that is 20–50 mm long. Flowering plants do not have a rosette, and instead produce up to eight or more pale green and translucent green flowers marked with darker green lines, borne on a flowering stem 70–500 mm high. The flowers themselves are 9–12 mm long and 4–6 mm wide. The flowering stem bears four to seven dark green, egg-shaped to lance-shaped leaves that are 10–60 mm long and 3–9 mm wide. The dorsal sepal and petals are fused together to form a hood, called a "galea", that covers the column, and the dorsal sepal has a short brownish tip at its end. The lateral sepals are angled downwards: they measure 9–15 mm long and 4–6 mm wide, are joined for part of their length, and also have brownish tips. The labellum is 5–7 mm long, about 2 mm wide, and is light green with a darker green mid-line and a small mound near its base. Flowering takes place from July to September. This orchid is common and widespread in the Little Desert and Big Desert regions of Victoria, and in the Murray, Yorke Peninsula, South Eastern, and possibly Eyre Peninsula botanical regions of South Australia. It grows in sandy soil within plant litter under shrubs and small trees.
