4. Eragrostis nutans (Retzius) Nees ex Steudel, Nomencl. Bot., ed. 2. 1: 563. 1840.
细叶画眉草 xi ye hua mei cao
Poa nutans Retzius, Observ. Bot. 4: 19. 1786; Eragrostis guangxiensis S. C. Sun & H. Q. Wang.
Perennial. Culms erect, 30–60 cm. Leaf sheaths long silky hairs along summit; ligules fringed, ca. 0.3 mm; leaf blades 6–12 × 0.15–0.3 cm. Panicle contracted, spikelike, 7–14 × 1.5–3 (–5) cm; branches naked at lower part, ascending, glabrous in axils, lower branches (1.5–)3–8 cm. Spikelets 3–6 × 1–2 mm, usually (3–)5–12-flowered. Glumes chartaceous, broadly lanceolate to ovate, subequal, 1-veined. Lemmas 1.6–2 mm, ovate, chartaceous. Palea the same texture and length as lemma, 2-keeled, scabrous to ciliolate along keels. Stamens 3; anthers ca. 0.8 mm. Caryopsis ellipsoid, ca. 0.7 mm; embryo 1/2 length of the caryopsis.
Open, moist places, roadsides. Guangxi, Taiwan, Yunnan [India, Japan (Ryukyu Islands), Philippines].
This species is frequently confused with Eragrostis gangetica (Roxburgh) Steudel, which is an annual.