Digitaria cognata is a species of grass known by the common names fall witchgrass,Digitaria cognata. USDA Plants Profile. Carolina crabgrass,Digitaria cognata. USDA NRCS Plant Fact Sheet. and mountain hairgrass.Digitaria cognata. NatureServe.
Description This grass is a perennial without rhizomes. The roots are shallow. The erect stems grow up to 56 centimeters tall. The stem bases are tough and hairy. The leaves are up to 12.6 centimeters long.Digitaria cognata. Grass Manual Treatment. They are narrow, with "one side wavy, and the other smooth". The inflorescence is a purple-tinged panicle with single-flowered spikelets.
Uses This grass provides graze for livestock and wild ungulates, and birds eat the seeds.
References
External links USDA Plants Profile for Digitaria cognata (fall witchgrass)