Eustachys tener (Presl) A. Camus, Rev. Bot. Appl. Agr. Colon. 5: 208. 1925. Hsu, Fl. Taiwan 5: 470. 1978.
Cynodon tener Presl, ReL Haenk. 1: 291. 1830.
Culm and sheath strongly compressed. Blade linear, about 5 cm long by 0.5 mm wide, abruptly rounded at the apex; ligule about 1 mm long, a fringe of hairs. Inflorescence of 4-6 digitate spikes, spike about 5 cm long. Spikelets 3-flowered, about 1.1 mm long, oblong, sessile; rachis triangular, pilose on the ridges; glumes chartaceous, 1-nerved, 1 mm long; the lower boat-shaped, keeled; the upper glume as long as the lower, aristate, siliceous on back. Lower floret fertile; lemma subcoriaceous, boat-shaped, ovate, 3-nerved, margins inrolled, ciliate on midrib and margins; palea chartaceous, obovate, bidentate, 2-keeled, sliceous on keels.
TAICHUNG: Tatushan, Hsu 10752. CHIAYI: Chiali, Wang 20122. TAINAN: Hsinhua, Hsu & Kuoh 13656. PINGTUNG: Santimen, Suzuki s. n. Sept. 1, 1932.
Distributed in Vietnam, the Philippines, Hainan (China) and Taiwan.
In open places at low altitudes. Locally it is known from the central and southeastern parts of Taiwan.