Perennial herb. Flowering stems up to 1.5 m high; robust, ribbed, leafy, glabrous. Leaves compound; leaflets opposite, blade narrowly ovate, apex acute, margins with regular serrations, teeth curved inwards, often slightly overlapping. Flowers: involucral bracts present; yellowish to greenish white; Dec.-Mar. Fruit laterally flattened, ridged.
Perennial herb, up to 1.5 m high, glabrous. Leaflet margins with regular serrations. Inflorescence obviously leafy; bracts present. Fruit not strongly dorsiventrally compressed. Flowers yellowish to greenish white.
Distinguished from B. thunbergii by the evenly denticulate leaflet margins with incurved, white, slightly overlapping teeth and the widely spaced, relatively small vittae.