Glabrous, 1-2 m tall, branched; nodes swollen. Leaves pinnately to ternate¬ly dissected; segments filiform to linear. Peduncles 5-12 cm long. Involucre of divided bracts, deflexed; segments filiform. Umbel receptacle enlarged. Rays up to 50, contracted in fruit, stout. Involucel of linear bractlets. Calyx teeth minute. Fruit ovoid to oblong, 2 mm long.