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Annual. Culms loosely tufted, slender, ascending, 10–35 cm tall, branched. Leaf blades linear, flat, 3–10 × 0.2–0.5 cm, scaberulous, often with long scattered bristles, margins thickened, scabrid, sometimes with a few bristles but not pectinate, apex acute; ligule 0.4–1 mm. Panicle ovate, 2–7 cm; lowest primary branches whorled, succeeding branches subwhorled, lower 1/3–1/2 bare, a linear glandular patch on bare portion, spikelets borne on short 2–4-spiculate branchlets or directly on primary branches. Spikelets gray, narrowly elliptic, 1–1.7 mm, usually scaberulous; lower glume ovate, 0.2–0.4 mm, veinless, obtuse; upper glume elliptic, as long as spikelet, 1-veined, acute; lemma elliptic, slightly shorter than upper glume, 1-veined, acute. Anthers 3, 0.2–0.4 mm. Grain obovate, 0.7–0.8 mm, apex rounded. 2n = 24, 36.
Tufted annual; culms 7–20 cm. high, erect or ascending.. Leaf-blades broadly linear, 2–10 cm. long, 2–4 mm. wide, the margins scabrid or with a few long stiff hairs near the base.. Panicle ovate, 2–8 cm. long; primary branches in whorls, spreading horizontally soon after emergence from the uppermost leaf-sheath.. Spikelets 1–1.4 mm. long, glabrous or scaberulous, greyish green; lower glume a little oblong scale, 0.1–0.5 mm. long; upper glume oblong-elliptic, as long as the spikelet; lemma similar, but a little shorter; anthers 3, 0.2–0.3 mm. long.. Grain obovate, 0.7–0.8 mm. long.
Tufted annual 100-340 mm high. Leaf blade 20-100 mm x 2-4 mm. Inflorescence with all branches whorled; central axis and branches with viscid patches that are more than 3 x longer than wide. Spikelet 1.0-1.5 mm long; glumes unequal; lower glume 1/4-1/3 as long as spikelet, 0.1-0.5 mm long, oblong, apex obtuse; upper glume as long as spikelet, apex acute; lemma as long as spikelet, oblong-elliptic; anther 0.30-0.50(0.65) mm long.
Caespitose annual; culms up to 25 cm tall, erect or ascending, branched or unbranched; leaf sheaths chartaceous, usually glabrous, sometimes with tubercle-based hairs near the margins above, lightly compressed; leaf laminas 2–10 cm × 2–4 mm, flat, glabrous or scattered tuberculate-pilose on the surface, scabrid on the margins or with a few long stiff tubercle-based hairs below, acute or subacute at the apex.
Spikelets (1)1.2–1.4(1.6) mm long, greyish-green; inferior glume 1/4–1/3 the length of the spikelet, oblong, nerveless, glabrous, obtuse at the apex; superior glume as long as the spikelet, oblong-elliptic, 1-nerved, glabrous to scaberulous or minutely asperulous, acute at the apex; lemma as long as the spikelet or almost so, oblong-elliptic; anthers 3, (0.2)0.3–0.55 mm long.
Annual; up to 0.34 m high; tufted. Leaf blades 20-100 x 2-4 mm. Flowers: panicle with lowest branches in a single whorl; central axis and branches with viscid patches > 3 x longer than wide; spikelets 1.0-1.5 mm long; lower glume oblong; 0.1-0.5 mm long; < 1/3 spikelet length; upper glume as long as spikelet.
Panicle 2–8 cm long, ovate; branches in a succession of whorls, smooth, with numerous elongated viscid glandular patches, the spikelets 2–3 on secondary branchlets, these ± confined to the distal part of the primary branches.
Grain obovate, 0.7–0.8 mm long, terete or lightly laterally compressed.
