Perennials or annuals, 15-50-(90) cm, loosely tufted, often with creeping stolons rooting at nodes. Leaf-sheath chartaceous, striate, glabrous, greyish green. Ligule 1.5-5.5 mm, truncate, erose, ciliate, abaxially minutely scabrid. Leaf-blade 2.5-18 cm × 2-9 mm, linear-lanceolate, finely striate, scabrid, tip acute. Culm 9-50 cm, decumbent and rooting at lower nodes, internodes glabrous. Panicle 3-14 × 1-3-(5) cm, ± dense, oblong but much lobed, sometimes interrupted near base; rachis smooth, branches scabrid, with spikelets almost to base, pedicels densely scabrid, very short, disarticulating. Spikelets 1.5-1.9 mm, pale green or purplish, falling entire at maturity with portion of pedicel attached. Glumes equalling spikelet, 1-nerved, elliptic, entire, firmly membranous, scabrid, keel more prominent in upper ½, awnless. Lemma c. 1 mm, hyaline, broadly elliptic, glabrous, awnless, apex denticulate, minutely ciliate. Palea narrower than lemma, apex bifid, ciliate. Anthers 0.4-0.6 mm. Caryopsis 0.8-1 × 0.3-0.6 mm.