Spikelets divaricate, forming 75-90° angle with rachis, 10-40 × 2.4-3 mm; floral scales ovate, widest at midlength, (2.7-)2.9-3.4(-3.6) × (1.8-)1.9-2.3(-2.4) mm. Flowers: anthers (1.2-)1.3-2(-2.1) mm; styles (0.9-)1.3-2(-2.2) mm; stigmas (2-)2.3-2.8(-4) mm. Fruiting summer. Dunes, disturbed soils, croplands; 0-200 m; Calif., Fla., Ga., N.Mex., N.Y., N.C., S.C., Tex.; Mexico; Central America; South America.