类黍尾稃草 lei shu wei fu cao

Panicum panicoides (P. Beauvois) Hitchcock; Urochloa jinshaicola B. S. Sun & Z. H. Hu; U. longifolia B. S. Sun & Z. H. Hu; U. longifolia var. yuanmuensis (B. S. Sun & Z. H. Hu) S. L. Chen & Y. X. Jin; U. yuanmuensis B. S. Sun & Z. H. Hu.

Annual. Culms loosely tufted, geniculately ascending, 20–80 cm tall, nodes bearded. Leaf sheaths loose, with tubercle-based setae, one margin densely ciliate; leaf blades linear-lanceolate, 5–15(–20) × 0.5–1.5 cm, glabrous to thinly pilose, margins pectinate-ciliate at least toward amplexicaul base, apex acuminate; ligule 1.5–2 mm. Inflorescence axis 3–6 cm; racemes 3–10, 2–6 cm, stiff, diverging; rachis flattened, setose mainly from the short stout pedicels; spikelets usually borne singly or in pairs at base, occasionally mostly paired, overlapping by ca. 1/3 their length. Spikelets ovate-elliptic, 4–5 mm, glabrous or pubescent, cuspidate; lower glume ovate,1/4–1/3 spikelet length, 3–5-veined, obtuse; upper glume 5–9-veined with evident cross veins; upper lemma rugose, mucro 0.4–1 mm. Fl. and fr. Sep–Oct.

Moist grasslands, lakesides. Sichuan, Yunnan [Bhutan, India; E and S Africa].

Urochloa setigera can be confused with forms of U. panicoides with pubescent, paired spikelets, especially when the base is missing. Urochloa panicoides has less abruptly cuspidate spikelets, a more coarsely rugose fertile floret, and a much longer mucro on the upper lemma.