Plants annual; cespitose, without innovations, without glands. Culms
5-40 cm, erect, glabrous, occasionally with oblong glandular areas below the nodes.
Sheaths hairy on the distal margins and at the apices, hairs to 4 mm, stiff;
ligules 0.2-0.3 mm; blades 2-8 cm long, 2-4 mm wide, flat to involute,
abaxial surfaces smooth, adaxial surfaces scabridulous, bases occasionally with
papillose-based hairs. Panicles 4-15 cm long, 1-7 cm wide, cylindrical
to narrowly ovate, open, rachises sometimes glandular below the nodes; primary
branches 0.5-4 cm, diverging 20-100° from the rachises; pulvini
sparsely pilose; pedicels 1-4(7) mm, as long as or longer than the spikelets,
mostly pendent, lax, terete. Spikelets (1)1.5-2.5 mm long, 0.9-1.4 mm wide,
ovate to oblong, reddish-purple to greenish, with 4-8 florets; disarticulation
basipetal, glumes persistent. Glumes ovate, hyaline, keeled, veins commonly
green; lower glumes 0.4-0.7 mm; upper glumes 0.7-1 mm; lemmas
0.7-1.1 mm, ovate to broadly oblong, membranous, lateral veins usually greenish,
apices truncate to obtuse; paleas 0.6-1.1 mm, hyaline, keels ciliate, cilia
0.3-0.5 mm, apices obtuse to truncate; anthers 3, about 0.2 mm, purplish.
Caryopses 0.3-0.5 mm, ellipsoid, translucent, light brown. 2n
is native to the Eastern Hemisphere. It is now naturalized
in the southeastern United States, growing in open areas such as cultivated fields,
forest margins, and roadsides at 0-200 m.