Setaria yunnanensis Keng fil. & K. D. Yu

This species, with a bristle only at the branch tips, is close to Paspalidium. The bristles are very inconspicuous when they are shorter than the spikelets.

Annual. Culms rather slender, ca. 70 cm tall, ca. 1.5 mm in diam., nodes pubescent. Leaf sheaths glabrous or papillose-pilose, margins ciliolate; leaf blades linear-lanceolate, thin, 3–14 × 0.4–1.2 cm, papillose-pilose on both surfaces, narrowed toward base, apex acuminate. Panicle open, 4–17 × 0.5–3 cm, branches ascending, simple or the lowermost with secondary branchlets, every branchlet tip extended into a 1–8 mm bristle, rarely a few spikelets also subtended by a single bristle; axis scabrous to ciliolate along the edges. Spikelets ovate-lanceolate to elliptic, 2.4–2.6 mm, yellowish green or tinged purple; lower glume triangular, 1/3 as long as spikelet, 1–3-veined, acute or acuminate; upper glume as long as or slightly shorter than spikelet, 5-veined, acute or obtuse; lower lemma as long as spikelet, subpapery, 3–5-veined, acute; upper lemma as long as lower, finely punctate-rugose. Fl. and fr. Jun–Oct.

Sichuan, Xizang, Yunnan.

* Roadsides, streams, coniferous forests; 2300–3900 m.