Elatostema brevifolium (Bentham) A. Haller; E. radicans var. minimum (Makino) H. Schroeter; Pellionia minima Makino.

Herbs perennial, monoecious or dioecious. Stems prostrate, branched, pubescent or strigose. Leaves alternate; stipules subulate, 1-2 × 0.1-0.2 mm; petiole 0.5-2 mm; leaf blade herbaceous, obliquely elliptic or obovate, 0.5-3.2 × 0.4-2 cm, major lateral veins asymmetric, one basal, the other arising above base, broader outer half auriculate, margin undulate-crenate or crenate, apex rounded or obtuse; cystoliths obscure; nanophyll absent. Staminate inflorescences 0.8-1.5 cm in diam., peduncle 1-4 cm; staminate flowers: tepals 5, elliptic; stamens 5; rudimentary pistil obscure. Pistillate inflorescences 2.5-4 mm in diam., peduncle to 3(-10) mm; pistillate flowers: tepals 5. Achenes ellipsoidal or narrowly ovoid, tuberculate. Fl. May-Oct.

Mountain forests, valley streamsides, damp rocks; 300-1600 m. S Anhui, Fujian, Guangdong, Guangxi, SW Hubei, Hunan, Jiangxi, Zhejiang [Japan].