Setaria forbesiana (Nees ex Steud.) Hook. fil.

Perennial from a knotty rootstock. Culms rigid, erect or geniculate, 60–170 cm tall, 2–4 mm in diam., glabrous. Leaf sheaths glabrous, margins densely ciliate with silky hairs; leaf blades broadly linear or linear-lanceolate, 10–40 × 0.4–2 cm, glabrous, base subrounded or cuneate, apex acuminate; ligule ca. 3 mm. Panicle open, linear to narrowly pyramidal, 10–40 cm, erect or slightly nodding, branches spaced, ascending, lowest 0.5–2 cm, spikelets subtended by a single bristle; axis scabrous to hispid; bristles 3–4 times spikelet length, stout, stiff green or purple. Spikelets elliptic or ovate, 2.8–3.2 mm, strongly veined; lower glume broadly ovate, 1/3–1/2 as long as spikelet, acute; upper glume 2/3–3/4 as long as spikelet, (5–)7–9-veined; lower floret staminate, as long as upper floret; lower palea well developed; upper lemma finely punctate-rugose. Fl. and fr. Jul–Oct.

Nepal, India, Burma to China.

Anhui, Gansu, Guangdong, Guangxi, Guizhou, Henan, Hubei, Hunan, Shaanxi, Sichuan, Yunnan, Zhejiang [Bhutan, N India, Myanmar, Nepal].

1400-2000 m

Mountain slopes, valleys, roadsides, streams; 300–2000 m.

Setaria forbesiana là một loài thực vật có hoa trong họ Hòa thảo. Loài này được (Nees ex Steud.) Hook.f. miêu tả khoa học đầu tiên năm 1896.

西南莩草（学名：Setaria forbesiana）为禾本科狗尾草属下的一个种。