Culms 15-75 cm. Sheaths hispid; ligules to 2 mm, membranous and ciliate; blades to 8 cm long, 15-25 mm wide, flat, cordate, hispid abaxially, glabrous adaxially, margins with papillose-based hairs. Panicles with 4-7 digitate branches; branches 2-16 cm. Spikelets 2.7-3.2 mm, subsessile; upper lemmas awned, awns 0.4-1.2 mm. 2n = 36.
Alloteropsis cimicina is native to southeast Asia but has been collected in Alachua and Columbia counties, Florida, and Baltimore, Maryland. Being a weedy species, it should be sought at other disturbed locations along the east coast of the United States.