瘦脊伪针茅 shou ji wei zhen mao

Panicum sordidum Thwaites, Enum. Pl. Zeyl. 443. 1864; Chamaeraphis spinescens (R. Brown) Poiret var. depauperata Nees ex J. D. Hooker; Pseudoraphis depauperata (Nees ex J. D. Hooker) Keng; P. spinescens (R. Brown) Vickery var. depauperata (Nees ex J. D. Hooker) Bor; P. ukishiba Ohwi.

Culms tufted, slender, 20–50 cm, internodes often purplish, nodes pubescent to subglabrous. Leaf sheaths loose, auricles variable, often inconspicuous; leaf blades linear, 2–6 × 0.2–0.4 cm, base contracted, apex acute; ligule a ciliate membrane. Inflorescence contracted, almost spikelike, oblong, 2–8 cm, enclosed at the base by the uppermost leaf sheath or only slightly exserted; racemes erect, bearing a single spikelet (rarely 2), terminal bristle 8–12 mm. Spikelets 4–6 mm; lower glume 0.6–0.8 mm; upper glume as long as the spikelet, 7 main veins with thinner intermediaries, sparsely strigose on lower back and near margins, sharply acuminate; lower lemma subequal to upper glume, 7-veined; anthers 2, 0.6–1.1 mm; upper lemma 1.3–1.4 mm. Fl. and fr. autumn.

Shallow lakes, streams; 100–500 m. Fujian, Hubei, Hunan, Jiangsu, Shandong, Yunnan, Zhejiang [India, Japan, Korea, Sri Lanka].

The name "Chamaeraphis depauperata Nees ex Steudel" (Syn. Pl. Glumac. 1: 49. 1853) was not validly published because it was merely cited as a synonym of Panicum asperum Wight ex Steudel (1853), not Lamarck (1779).