Caleana

Terrestrial glabrous herbs, arising from ovoid tubers. Leaf solitary, basal, linear, narrow-lanceolate or ovate; flowering stem erect, with or without a sheathing bract near base. Flowers usually somewhat reddish to strongly reddish pink, or greenish, 1–few on slender pedicels, subtended by a loosely sheathing acute bract, labellum uppermost; perianth segments linear; dorsal sepal slightly incurved behind column; lateral sepals reflexed; petals deflexed against side of column. Labellum articulate with foot of column, on movable claw attached somewhere near middle of lamina back; lamina ovate to ovoid, convex, upper surface smooth or variously glandular. Column elongate, at c. 90 deg., or appressed, to ovary, broadly winged along entire length, sometimes on to the column foot as well; column closed by labellum when claw is irritated.