Erect, usually spindly shrub to c. 2 m high; branches slightly ridged when young, warted, glabrescent. Leaves trifoliolate; leaflets narrow-elliptic, oblong or lanceolate, 18–54(–73) mm long, 4–9 mm wide, acute, discolorous, dotted with raised oil glands, glabrous except for few stellate hairs along midvein, margins entire, slightly undulating, somewhat to strongly recurved; petiole 10–16 mm long. Inflorescence usually shorter than the leaves, 7–60-flowered. Sepals deltoid, 1–1.5 mm long, glabrous to hirsute, tuberculate; petals 2–4 mm long, usually white, rarely pink, imbricate, pubescent; ovary glabrous. Follicles somewhat warted, glabrous, usually with a small terminal appendage; seed c. 2.5 mm long, reddish-brown to black, striated. Flowers spring and autumn.
GipP, EGL, EGU, HSF, HFE. Rather rare in Victoria where usually on dry rocky ground, often on rainforest margins, riparian scrub, or on open rocky outcrops.
Several distinctive local forms are known and infraspecific taxa are sometimes recognised, but the current concept of the species includes these in a single variable entity. A population on Genoa Peak has leaflets that are exceptionally small (10–20 mm long and 1–3 mm wide), and flowers in short congested cymes.
