Perennial, geophytic herb. Leaves verticillate or irregularly arranged. Leaves: lamina linear to oblong. Flowers: corolla lobes replicate; corona ± equalling the gynostegium; lobes oblong to ovate in dorsal view, with a simple or bifid tongue-like ventral appendage, either inflexed towards gynostegium or reflexed at its tip. Anthers with appendages reniform, broader than long, concealed beneath overhang of gynostegial head; corpusculum not flanged. Pollinia: attachment median; sausage-shaped, slightly compressed with germination zone occupying apex of pollinium. Gynostegium conspicuously swollen above anthers.