Perennial herb. Flowering stems up to 1 m high; erect, slender, glabrous. Leaves radical, grass-like; blade linear-subulate, 400 x 10 mm, parallel-veined. Flowers: inflorescence loosely branched, umbels few, delicate; involucral bracts narrowly ovate; yellow; Nov.-Jul. Fruit elliptic, not compressed, ribbed.
Tufted perennial to 60 cm, from woody base. Leaves mostly basal, linear to oblanceolate, grass-like. Flowers in compound umbels on branched peduncles, yellow. Fruit narrowly oblong in dorsal view, mericarps isodiametric, ribbed, vittae present, 3 to 4 between each rib, rib oil ducts inconspicuous.
Tufted perennial, up to 0.6 m tall, base woody. Leaves simple, linear to oblanceolate, grass-like. Flowers yellow. Fruit narrowly oblong in dorsal view, mericarps isodiametric, ribbed, homomorphic, vittae present, 3 or 4 between each rib, rib oil ducts inconspicuous.
Distinguished by the perennial, branched habit and slender, grass-like leaves (easily mistaken for a tuft of grass when not in flower).
Perennial herb, up to 1 m high. Leaves linear-subulate, parallel-veined. Bracts lanceolate. Fruit oblong. Flowers yellow.