Annual or perennial herbs or small shrubs, glabrous, papillate or with simple or branched hairs. Leaves pinnately lobed, toothed or entire. Inflorescence an elongating raceme. Sepals erect, tightly enclosing basal portion of petals, one opposite pair usually (always in Victoria) saccate; petals clawed, drawn out into long narrow apex; stamens 6. Fruit circular in cross-section or flattened parallel to the septum, less than 3 times as long as broad, dehiscent; stigma sessile, large and capitate; valves not winged; seeds in 2 rows, mucous.
9 species, all endemic in Australia.
Characterized by the long tapering petal apices and the oblong, obovoid or globose fruits with smooth surface.