无名臂形草 wu ming bi xing cao

Panicum kurzii J. D. Hooker, Fl. Brit. India 7: 38. 1896 ["1897"]; Urochloa kurzii (J. D. Hooker) T. Q. Nguyen.

Annual. Culms decumbent or shortly stoloniferous, rooting at lower nodes, 15–60 cm long, nodes pubescent. Leaf sheaths glabrous, outer margin ciliate; leaf blades lanceolate, 5–8 × 0.8–1.8 cm, sparsely pilose, base cordate, margins thickened, setose near base, apex acuminate. Inflorescence axis 5–8 cm; racemes 3–7, 5–7.5 cm, divergent, the lower with short racemelets bearing 2 (or infrequently more) spikelets; rachis triquetrous, 0.2–0.4 mm wide, with scattered bristles; spikelets single, distant; pedicels scabrid. Spikelets elliptic, 2.5–3.5 mm, glabrous, apex acute; lower glume ovate, 1/3 spikelet length, clasping, 3–5-veined, obtuse; upper glume 1/2 spikelet length, 7-veined, acuminate; lower lemma similar to upper glume, as long as spikelet, 5–7-veined, acute; upper lemma shorter than spikelet, rugose, apex briefly apiculate.

Thickets; ca. 1400 m. Yunnan (Jianshui) [India, Indonesia, Thailand; Australia (Queensland)].