Plants annual; tufted, without innovations, without glands. Culms
10-50 cm, erect, glabrous below the nodes. Leaves mostly basal; sheaths
mostly glabrous, apices pilose, hairs 0.4-3 mm; ligules 0.1-0.2 mm, ciliate;
blades (1.8)5-12 cm long, 2-6 mm wide, flat to involute, abaxial surfaces
glabrous, adaxial surfaces scabridulous and glabrous or sparsely hairy, hairs
appressed. Panicles 6-15 cm long, 0.5-7 cm wide, ovate, open to contracted;
primary branches 0.2-5 cm, appressed or diverging up to 70° from the
rachises, glabrous; pulvini glabrous; pedicels 2-8 mm, glabrous.
Spikelets 4-8(10) mm long, (1.6)2-4 mm wide, ovate-lanceolate, loosely
imbricate, straw-colored to purplish, with 12-42 florets; disarticulation
acropetal, paleas not persistent, rachillas persistent. Glumes ovate-lanceolate
to lanceolate, hyaline to membranous; lower glumes 1-1.8 mm; upper glumes
1-2.2 mm; lemmas 1.5-1.9 mm, broadly ovate, membranous, lateral veins raised,
apices obtuse to acute; paleas 1.4-1.9 mm, hyaline, keels scabridulous,
apices acute to obtuse; anthers 2, 0.2-0.4 mm, purplish. Caryopses
0.6-0.9 mm, ellipsoid, laterally compressed, not grooved, smooth, light brown.
= 20, ca. 30.
is an Asian species that is now established in the
southeastern United States, growing along roadsides and in disturbed ground, at