- = Oxalis lactea Hook. (1836)
- = Oxalis cataractae A.Cunn., Ann. Nat. Hist. 3: 315 (1839)
Perennial, sometimes mat-forming. Stems to c. 15 cm long, thin, creeping, glabrous, rooting at nodes. Lvs 3-foliolate, the rosettes in tufts at intervals, glabrous or hairy. Petiole (0.5)–1.5–5–(9) cm long, often dark reddish; stipules 3–5 mm long, broad and scarious. Lamina of leaflets equal, subsessile or nearly so, 2.5–9 × 2.5–9 mm, broadly obcordate, often dark reddish or deep purple below; sinus broad or narrow, rather shallow. Fls solitary; peduncles slender, 1–6–(11) cm long, hairy. Bracts 2.5–4 mm long, linear-lanceolate, glabrate; calli 0. Sepals 3–5–(6) mm long, ± elliptic, with ± appressed hairs; calli 0. Petals 8–15–(20) mm long, broad-obovate, white, usually glabrous, sometimes ciliate. Stamens at 2 levels, glabrous; filaments not dilated at base. Styles slightly to obviously > longer stamens, glabrous. Capsule 4–5 mm diam., globose. Seed 5–7 mm long, ± ellipsoid-ovoid, with prominent raised reticulations.
[From: Webb et al. (1988) Flora of New Zealand. Volume 4.]
Flowering: Jul.–Apr.