Plants annual. Culms 10-53 cm, erect; nodes glabrous. Sheaths
pubescent or glabrous; ligules 2-4.1 mm; blades 5-25(80) cm long,
2.9-10.2(12) mm wide, flat. Panicles terminal, with 1-5 racemosely arranged
branches; branches 1.1-5.4(7) cm, divergent; branch axes 0.8-1.3
mm wide, not or narrowly winged, glabrous, terminating in a spikelet. Spikelets
2.1-2.6 mm long, 1.7-2.4 mm wide, paired, appressed to the branch axes, broadly
obovate to suborbicular, shortly pubescent, light to dark brown. Lower glumes
absent; upper glumes and lower lemmas shortly pubescent, 5-7-veined,
margins entire; lower paleas rarely present; upper florets dark
glossy brown. Caryopses 1.3-1.5 mm, white. 2n = 30, 32, 40, 60.
Paspalum convexum grows in disturbed areas in the southern United States.
It is native from Mexico and the Caribbean Islands to Brazil. It is not considered
to have particularly high forage value.