Annuals or short-lived perennials, weakly stoloniferous. Culms ascending, loosely tufted, 40–50 cm tall, 0.4–1 mm in diam., sparsely scabrid below the nodes, nodes 4 or 5, none or 1 exserted. Leaf sheaths sparsely scabrid, 9–12 cm, 5/7–1 × as long as blade, uppermost closed for ca. 3/5 of length; blade flat, thin, 10–15 cm × 1.5–3 mm, abaxially sparsely scabrid, adaxially and margins scabrid, apex slender prow-tipped; ligules 1–1.5(–2) mm, abaxially scabrid, apex obtuse, collars ciliate margined. Panicle open, lax, 10–15 cm, barely exserted, longest internodes 2.5–3 cm; branches spreading, 2 per node, densely scabrid angled throughout, longest 2–4 cm with 5–8 spikelets in distal 1/2. Spikelets 3.5–5 mm, florets (1 or)2; vivipary absent; rachilla to 1.2 mm, smooth, glabrous; glumes unequal, very thinly papery, keels scabrid, lower glume narrowly lanceolate, 1.5–3 mm, 1-veined, upper glume 3–4 mm, 3-veined; lemmas 3–4 mm, very thinly papery, glabrous, keel faintly scabrid toward the apex, intermediate veins moderately prominent, areas between veins smooth, minutely bumpy, apex sharply acute to acuminate; callus webbed; palea shorter than lemma, smooth between keels, keels scabrid. Anthers 0.7–1 mm. Fl. and fr. Jul–Aug.
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