A stout herb. It grows 1 m tall. It keeps growing from year to year. The stems have furrows along them and they grow from a well developed taproot. The leaves are towards the base of the stem and are of 2 forms. The ones at the base are broadly oval and can have 3 lobes. They have teeth. The leaves on the stem are narrow. The flowers are in groups with equal length stalks.
Small tree, 1.5-5.0 m high. Leaves distichous, discolorous, upper surface dark green, lower surface silvery glaucous. Primary umbel often multiradiate, shortly pedunculate. Flowering time Sept.-Nov. Fruit 5.5-8.5 mm long, outline elliptic, marginal wings thick and narrow, glabrous; vittae 11 in each mericarp (2 in commissure usually very broad).
Like N. tenuifolium but larger shrub or small tree up to 5 m, leaves discolorous, silvery and glaucous below, leaflet lobes broader and more congested. Fruit elliptic, > 5.5 mm long.