About Diuris brachyscapa D.L.Jones & C.J.French
Diuris brachyscapa is a tuberous perennial herb that typically reaches a height of 150–300 mm (5.9–11.8 in). It has two or three linear leaves that measure 120–250 mm (4.7–9.8 in) long and 8–12 mm (0.31–0.47 in) wide. This species produces up to four pale yellow flowers with brown markings, each 20–30 mm (0.79–1.18 in) wide. The flowers have erect, ear-like petals 13–20 mm (0.51–0.79 in) long, an egg-shaped dorsal sepal 4–8 mm (0.16–0.31 in) long and 7–11 mm (0.28–0.43 in) wide, and narrowly oblong lateral sepals 11–18 mm (0.43–0.71 in) long. Its labellum has three lobes: the lateral lobes are broad and spreading, while the middle lobe is broad and ranges from flattened to convex, with a yellow callus. Flowering takes place from late July to September. This donkey orchid is similar to Diuris corymbosa, but it is shorter and produces fewer, smaller flowers. It is commonly called the Western wheatbelt donkey orchid, and grows in woodland as well as on and around granite outcrops. It occurs between the Albany and Great Eastern Highways, near Katanning and Ravensthorpe, in the Avon Wheatbelt, Esperance Plains, Jarrah Forest and Mallee bioregions of south-western Western Australia.
