Description from Flora of China
Aira indica Linnaeus, Sp. Pl. 1: 63 ["spicata"], errata [1231, "indicum"]. 1753; Panicum angustum Trinius; Saccio-lepis angusta (Trinius) Stapf; S. spicata Honda ex Masamune, nom. illeg. superfl.
Annual. Culms slender, weakly ascending from a branching, decumbent base, 20–100 cm tall. Leaf sheaths slightly keeled; leaf blades linear, flat to loosely involute, 5–20 × 0.2–0.5 cm, apex acute; ligule 0.2–0.5 mm. Panicle spikelike, 11–16 × 0.3–0.5 cm, axis glabrous. Spikelets green or purplish green, lanceolate, laterally compressed, 2–2.8 mm, glabrous or papillose-hispid, obtuse; glumes ovate, herbaceous with broad hyaline margins and apex, lower glume 1/3–1/2 spikelet length, 3–7-veined; upper glume 7–11-veined; lower lemma as long as upper glume; palea small and hyaline; upper lemma yellowish, narrowly ovate, 1/2 spikelet length. Fl. and fr. Jul–Nov. 2n = 18.
The name Aira indica was originally given as "Aira spicata," but this was corrected by Linnaeus in the errata on the final page  of Species Plantarum.
The combination "Sacciolepis indica var. angusta (Trinius) Keng" (Fl. Ill. Pl. Prim. Sin. Gram. 662. 1959) was not validly published because a full and direct reference to the basionym was not provided.
Moist places, valleys, streams. Anhui, Fujian, Guangdong, Guizhou, Hainan, Heilongjiang, Henan, Hubei, Jiangxi, Shandong, Sichuan, Taiwan, Yunnan, Zhejiang [Bhutan, India, Japan, Myanmar, Nepal, Thailand, Vietnam; Africa, Australia, Pacific Islands].