Microstegium vimineum (Trin.) A.Camus

Annual. Culms decumbent, up to 1 m long. Leaf sheaths shorter than internodes, upper usually enclosing cleistogamous spikelets; leaf blades narrowly elliptic, 4–9 × 0.5–0.8 cm, pubescent, often sparsely, midvein white, apex acuminate; ligule ca. 0.5 mm. Racemes 1–6, ascending, 4–6 cm; rachis internodes linear-clavate, ciliate, shorter than spikelet. Sessile spikelet 4–5.5 mm; lower glume narrowly lanceolate-oblong, back deeply grooved, puberulous-scaberulous or occasionally hispidulous, 0–4-veined between keels, veins connected by veinlets below apex, apex subtruncate; upper glume scabrid on keel, acuminate; lower floret reduced to an inconspicuous linear-lanceolate scale or absent; upper lemma lanceolate or oblong, 1–1.5 mm, acute or bidenticulate, awnless or shortly awned; awn weakly geniculate, often included within spikelet, up to 6(–9) mm; upper palea ovate, ca. 1 mm. Anthers 3, 0.5–1.5 mm. Fl. and fr. Aug–Nov.