滇南赤车 dian nan chi che

Elatostema paucidentatum H. Schroeter, Repert. Spec. Nov. Regni Veg. Beih. 83(2): 80. 1936; E. henryanum var. oligodontum Handel-Mazzetti; Pellionia longgangensis W. T. Wang; P. paucidentata var. hainanica Chien & S. H. Wu; P. subundulata W. T. Wang.

Herbs perennial, monoecious or dioecious. Stems erect or ascending, usually simple, glabrous or pubescent. Leaves alternate; stipules subulate, 2-7 × 0.1-0.3 mm; petiole 1.5-7 mm; leaf blade papery, obliquely elliptic or oblanceolate, 2-15.5 × 1.5-6.5 cm, major lateral veins asymmetric, one basal, the other arising above base, base obliquely cuneate, margin nearly undulate or undulate-crenate, apex cuspidate or acuminate; cystoliths conspicuous, dense or sparse; nanophyll absent. Staminate inflorescences 0.5-4.5 cm in diam., peduncle 2-7 cm; staminate flowers: tepals 4 or 5, elliptic; stamens 4-5; rudimentary pistil obscure. Pistillate inflorescences 0.4-2 cm in diam., peduncle 0.2-5.5 cm; pistillate flowers: tepals 5. Achenes ellipsoidal, tuberculate. Fl. Apr-Dec.

Valley streamsides, dark damp places; 200-2000 m. Guangxi, S Guizhou, Hainan, S Yunnan [N Vietnam].