is an Australian species, naturalized in and around various towns in southern Arizona and southern California. Plants are shrubs, up to 6 feet tall, profusely branched and sparsely hairy. Leaves, attached by stalks of around half an inch, are divided into three to eight pairs of well-separated linear leaflets, very narrow, with prominent midveins. The lower few leaflet pairs have one or more yellowish glands below the attachment point.
Flowers are formed of five hairy, greenish-yellow sepals, five much larger hairless, orange-yellow petals, and ten stamens, of unequal lengths, with thick yellowish filaments and relatively large, elongated brownish anthers. Fruits are flat green pods, up to 3 inches long.