Diuris tricolor

Flowering plant usually 20–40 cm tall, slender to moderately stout. Leaves 1–3, linear, channelled, 20–30 cm long. Flowers 2–6, erect, yellow to orange with white and purplish suffusions; dorsal sepal obliquely erect, broadly ovate, 10–15 mm long; lateral sepals deflexed, usually parallel, narrow-linear, greatly exceeding petals, 30–65 mm long; petals obliquely erect or recurved, ovate to elliptic, tapering to base, 13–21 mm long. Labellum 3-lobed from base, 8–12 mm long; lateral lobes erect, less than half as long as mid-lobe, oblong, margins crenulate; mid-lobe keeled, shortly clawed, ovate, margins irregular, with 2 longitudinal white and purplish ridges from the base ending in tooth-like processes less than midway along lamina. Column narrowly winged. Flowers Sep.–Nov.