Blue Lady Orchid

Thelymitra crinita is a tuberous, perennial herb with a single dark green, broadly lance-shaped leaf 50–150 mm (2–6 in) long and 10–45 mm (0.4–2 in) wide. Between two and fifteen flowers 30–45 mm (1–2 in) wide are borne on a flowering stem 200–750 mm (8–30 in) tall. The flowers are usually brilliant blue but vary from pale to dark blue. The sepals and petals are 15–22 mm (0.6–0.9 in) long and 6–10 mm (0.2–0.4 in) wide. The column is blue with a yellow crest, 4–5 mm (0.2–0.2 in) long and about 2.5 mm (0.1 in) wide and the lobe on the top of the anther is short and densely covered with short, finger-like yellow glands. Flowering occurs from September to November. The flowers are insect pollinated and open on sunny days. This species is similar to T. cornicina but has a much broader leaf than that species.

Blue lady orchid grows in coastal and near-coastal forest, sometimes in swampy places and is found between Gingin and Esperance in the Esperance Plains, Geraldton Sandplains, Jarrah Forest, Swan Coastal Plain and Warren biogeographic regions growing on grey-white sand and loamy clay.