裂颖雀稗 lie ying que bai

Annual. Culms tufted, erect, 30–100 cm tall. Leaf sheaths thinly hispid; leaf blades linear-lanceolate, 10–30 × 0.3–1 cm, both surfaces coarsely appressed hispid especially toward base, margins pectinate-ciliate, apex acuminate; ligule ca. 2 mm. Inflorescence axis 6–10 cm; racemes 3–5, 3–7 cm, loosely ascending, axils with long stiff hairs; spikelets usually paired but one of the pair often reduced; rachis flat, 1.2–1.5 mm wide, serrate-margined. Spikelets often purplish, circular in outline, 2.5–3.5 mm, acute; upper glume ovate, 3-veined, with stiff marginal wings ca. 1 mm wide, wings lacerate, wing margin ciliate with short stout hairs; lower lemma similar to upper glume but wing less developed; upper lemma ovate-elliptic, slightly shorter than spikelet, smooth, shining. Fl. and fr. summer–autumn. 2n = 40.

Recently naturalized. Taiwan [native to Central and South America and the West Indies].

Paspalum fimbriatum is easily separable from other species of Paspalum in China by its distinctive, winged spikelets.