Psoralea arborea

Erect shrub 3–5(–10) m tall; stems pubescent or glabrous. Leaves crowded, 3–5 cm long; leaflets 7–9, more or less terete, 35–40 mm long, 1–2 mm wide, channelled above, upper surface glabrous or glabrescent, lower surface bristly and gland-dotted, apices acute, margins entire; petiole 4–5 mm long; stipules lanceolate, shorter than petiole, partially fused. Flowers 1–3 in axils towards ends of stems; pedicels 11–35 mm long; cupulum to c. 5 mm long, 2-lobed; bracts ovate, 2–3 mm long; calyx campanulate, 6–8 mm long, densely hirsute, mainly black-haired, sometimes a few white hairs present also, gland-dotted, teeth equal, subequal to calyx tube; corolla c. 15 mm long, purplish; standard very broadly ovate, deep blue to purple; wings slightly shorter than standard, mauve; keel 10–11 mm long, white or very pale blue. Pod 4–5 mm long, included in calyx, rough-textured, black; seed 3–4.5 mm long, dark brown. Flowers mostly Sept.–Dec.