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Annuals, low growing. Culms ascending or prostrate, much branched. Leaf blades short, linear to lanceolate, flat or involute; ligule a line of hairs. Inflorescence a very dense panicle, spicate and cylindrical, or ovoid to capitate and then usually subtended by 1 or 2 inflated spathelike leaf sheaths with a reduced blade. Spikelets with 1 floret, strongly laterally compressed, disarticulating below the floret or rarely falling entire; glumes narrow, slightly shorter than lemmas, unequal to subequal, membranous, 1-veined, scabrid or ciliate along keel, acute or with a short awn-point; lemma lanceolate, membranous, 1-veined, awnless; palea similar to lemma, 1–2-veined, splitting at maturity. Lodicules absent. Stamens 2–3. Grain ellipsoid, pericarp free and sometimes swelling when wet.
Low growing annuals; culms prostrate or geniculately ascending. Leaf-blades usually short. Inflorescence a hemispherical to ovoid head, or a cylindrical spiciform panicle, embraced below by 1–2 inflated bract-like leaf-sheaths bearing a reduced blade, or sometimes exserted. Spikelets strongly laterally compressed, disarticulating below the floret, sometimes tardily so or rarely falling entire, awned or awnless; glumes subequal, shorter than the lemma; lemma 1-nerved; palea 1–2-nerved. Fruit rounded at the tip, not beaked.
Spikelets 1-fld, articulated above the glumes; glumes compressed and keeled, subequal, 1-veined, acute, scarious-margined; lemma membranous, somewhat longer than the glumes, 1-veined, awnless; palea about as long as the lemma; low annuals with erect to decumbent or prostrate stems, short blades, and dense, short, spike-like panicles of small spikelets; ligule a zone of hairs. (Heleochloa) 10, Old World.
Spikelets 1-flowered, strongly laterally compressed and keeled, disarticulating below the floret, sometimes tardily so or rarely falling entire, awned or awnless; glumes subequal or unequal, 1-nerved, membranous, equal to or shorter than the lemma, acute or with an awn-point; lemma 1-nerved, membranous, acute or with an awn-point; palea 1–2-nerved.
Inflorescence a hemispherical to ovoid head, or a cylindrical spiciform panicle, embraced below by 1–2 inflated bract-like leaf sheaths bearing a reduced lamina, or sometimes exserted.
Caryopsis elliptic, the pericarp free and sometimes swelling when wet.
