Annuals or short-lived perennials. Culms ascending to erect, 20–60 cm tall, nodes 3 or 4. Leaf sheaths shorter than internodes, smooth or scabrid; blade flat, grayish green, 4–8 cm × 1–3 mm, surfaces and margins scabrid; ligule 0.5–1.5 mm, abaxially pilulose, apex truncate to rounded, collar margin ciliate. Panicle narrowly oblong, 8–15 cm, longest internodes 3–5 cm; branches erect or curved ascending (sometimes spreading in fruit), 2 or 3(–5) per node, slender, scabrid angled from base, longest 2–6 cm with 5–15 spikelets in distal 1/2. Spikelets oblong to ovate, green, 4–5 mm, florets 3 or 4; vivipary absent; rachilla internodes 0.6–0.9 mm, glabrous; glumes slightly unequal, lanceolate, keel and veins distally scabrid, lower glume 2–2.4 mm, 1-veined, apex acuminate, upper glume oblong to lanceolate, 2.2–2.8 mm long, 3-veined, apex acuminate; lemmas 2.8–3.2 mm, keel villous for 3/4 of length, marginal veins to 1/2, area between veins glabrous or sparsely pilulose near keel; callus webbed; paleas distinctly shorter than the lemma, keels pilulose. Anthers (0.3–)0.4–0.7 mm. Fl. Jun–Jul. 2n = 28.
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