Perennial, up to 70 cm tall, branched, glabrous. Root fusiform, elongated. Leaves bipinnatisect; segments filiform to lanceolate or oval, lower leaves petio¬late, upper sessile; bases sheathing; sheath margin white, membranous. Involucre of 1-5 linear bracts or lacking. Rays 5-9, unequal. Involucel of minute bractlets or lacking. Flowers white or rose coloured. Calyx teeth obscure. Fruit pedicels very unequal. Fruit ovoid to oblong, yellowish brown, 3-4 mm long; ridges prominent, obtuse; furrows 1-vittate; commissure 2-vittate.