Culms erect or geniculate. Sheaths mostly glabrous, often with a few hairs on either side of the collar; ligules 1-1.5 mm; blades to 10 cm long, 2-3 mm wide, glabrous abaxially, mostly glabrous or scabrous adaxially, midveins often with a few hairs. Staminate culms 5-15(30) cm; panicles with 1-6 branches; branches 0.5-2 cm; spikelets 3-4 mm, glabrous; anthers 2-2.5 mm, pale. Pistillate culms to 10 cm; spikes with 6-12 spikelets (lower nodes sometimes with short branches); pistillate spikelets 2.8-4 mm; glumes to 3 mm; lemma bodies 2-2.5 mm, 3-lobed and 3-awned, awns 3.4-6.8 mm; palea keels exceeding the lemmas; rudiment 3-awned. 2n = unknown.

Opizia stolonifera grows along dry roadsides in Florida. No pistillate plants have been found in the Flora region.