Oxalis hirta L.

Perennial herb with erect stem to 30 cm high, sometimes branching; stem 1–2.2 mm wide, pubescent to hirsute, scaly at base; bulb ovoid to subglobose, 2–3 cm long, tunics dark red-brown; bulbils subterranean, formed on rhizome. Indumentum of simple, eglandular hairs. Stipules tapering into petiole, stipular wing hairy, often rather narrow and inconspicuous. Leaves cauline, alternate on upper stems, palmately trifoliolate; petiole (0.5–) 1–2 (–5) mm long, flattened, scaly; leaflets subsessile, equal, linear, oblong or obovate, 4–15 (–17) mm long, 3–5 (–7) mm wide, slightly emarginate, often conduplicate-falcate, green, glabrous above, pilose, often with numerous calli below (sometimes faint), margins ciliate. Inflorescences axillary, 1-flowered; peduncles 25–70 mm long, longer than leaves. Bracts situated in upper half of pedicel, linear or linear-subulate, 3–4.5 mm long, hairy, calli absent. Sepals lanceolate, obtuse, 4–8 mm long, pubescent, calli absent. Stamens at 2 levels; filaments glabrous. Petals ± broadly obovate, 14–30 mm long, pink or purplish, yellow at base, sometimes with purple streaks on the outer margin on outer surface, the outer surface hairy. Ovary with simple, antrorse, ascending, white hairs on the upper part near base of styles. Styles glabrous or puberulent above, with simple, ascending, antrorse, white hairs towards base. Capsules not developed in Australia.

Usually a weed of abandoned gardens, cemeteries and disturbed sites.