The World Flora Online

Herbs perennial, forming aerial portion only for a few months during early summer. Stem erect or climbing, branched distally, 9-32 cm, forming a tuber to 8 mm in diam. below ground, glabrous or with black, papillose glands. Basal leaves densely whorled, or absent in some populations, exstipulate, yellowish green to green; petiole 2-8 mm; leaf blade peltate, orbicular to suborbicular, 2-4 × 6-8 mm; some leaves reduced, linear, ca. 2 mm. Cauline leaves alternate, remote, exstipulate, yellowish green; petiole 0.8-1.3 cm; leaf blade peltate or lunate to semiorbicular, 2-3 × 4-5 mm, margin glandular hairy. Inflorescence terminal; cincinnus 2-6 cm, 3-22-flowered; bracts cuneate to oblanceolate or subulate; pedicels 0.6-2 cm. Sepals 5-7, united near base, yellowish green, lanceolate to ovate, 2-4 mm × ca. 1.5 mm, glabrous to glandular hairy, apex 5-7-fid. Petals usually white, rarely pink or red, oblong-cuneate, 4-6 × 2-3 mm. Stamens 5, 2-4 mm. Ovary subglobose, ca. 1.5 mm in diam.; placentas 3; styles 3, 2-5-parted, ca. 0.8 mm; stigma 2- or 3-fid. Capsule subglobose, (2 or)3(-5)-valved, 2-4 mm. Seeds ellipsoid-ovoid to globose, ca. 0.4 mm; venation scrobiculate. Fl. and fr. Jun-Sep. 2n = 32, 40.

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Caulescent herb with a subterranean tuber, 5–10 mm diam.; stem erect, glabrous up to 35 cm high, simple or with few branches. Stipules absent. Basal leaves early caducous; leaves along the stem with petioles 5–10 mm long; lamina peltate, triangular, 3–6 mm diam., with long tentacles. Cymes unbranched, few-flowered. Pedicels 1–2 cm. Sepals ovate-elliptic with serrate, fimbriate margin, 2–3 mm long. Petals white, obovate, 5–6 mm long. Stamens 5, free, 3–4 mm long with orbicular anthers. Ovary 3-carpellate; style 3, several times branched towards the apex. Capsule 3-valved, oblong spherical, ca 3 mm diam.

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In Thailand a typical mountain species occurring from 700 m up to 2100 m alt., found in open Pine forests with sandy soil and low grass vegetation as well as in Dipterocarp forests with lateritic soil.

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Ceylon, South-East Asia (absent from the Malay Peninsula, Sumatra and Borneo), Philippines, Japan and China; Australia (type) and Tasmania.

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