Perennial herb. Flowering stems up to 0.8 m high; erect; in dense clumps. Leaves radical, compound; blade pinnate or bipinnate; segments obovate, lobed or pinnatifid, apices of lobes mucronate. Flowers: involucral bracts present; white or yellow; Oct.-Jan. Fruit elliptic, 5-ribbed, winged.
Perennial herb, up to 0.8 m high. Leaves pinnate or bipinnate; leaflets obovate, lobed or pinnatifid; apices of lobes mucronate; cuneate. Umbels up to ± 15-flowered. Fruit elliptic, 5 ribbed (3 dorsal, 2 lateral); winged. Flowers white or yellow.
Distinguished by rosulate, broadly lobed leaves and large fruit. It differs from A. magalismontanum in the connate bracteoles (= involucel bracts) that are absent in the latter.