Elatostema subtrichotomum W. T. Wang

Herbs perennial, monoecious or dioecious, ca. 50 cm tall. Stems ascending or erect, simple or branched, glabrous. Leaves alternate, glabrous; nanophylls absent; stipules linear, 3-4 × 0.8-1 mm; petiole 2-14 mm; leaf blade obliquely oblong, 12-17 × 3.5-5 cm, herbaceous or nearly papery, major basal lateral veins ± absent and venation pinnate, cystoliths conspicuous, dense; base with broader half cuneate or nearly rounded, margin denticulate, apex acuminate. Male inflorescences in pairs, branched, ca. 10 mm in diam.; peduncle 2-3 mm; receptacle absent; bracts alternate, narrowly ovate or narrowly triangular, 0.8-1.2 mm. Female inflorescences in pairs, ca. 2 mm in diam., sessile; receptacle ca. 1.2 mm in diam.; bracts narrowly triangular; bracteoles lanceolate-linear. Male flowers 5-merous; perianth lobes with apex corniculate or not. Fl. Apr.

N Guangdong, C Hunan, SE Yunnan.

* Valley forests, streamsides, rock crevices; 1700-1900 m.

Elatostema subtrichotomum var. corniculatum W. T. Wang.