Plants perennial; shortly rhizomatous, often indistinctly so. Culms
30-110 cm, stout, erect; nodes glabrous. Sheaths glabrous; ligules
2-3 mm; blades to 35 cm long, 2-5.4 mm wide, conduplicate (rarely flat).
Panicles terminal, with 2-7 racemosely arranged branches; branches
1.6-7.1 cm, usually divergent, rarely merely ascending; branch axes 0.6-1.1
mm wide, glabrous, terminating in a spikelet. Spikelets 2.5-3 mm long,
1.5-2.2 mm wide, paired, appressed to the branch axes, elliptic-ovate, light to
dark brown. Lower glumes absent; upper glumes usually with short,
appressed pubescence, rarely glabrous, 5-veined, margins entire; lower lemmas
with short, appressed pubescence or glabrous, 3-veined, margins entire; upper
florets dark glossy brown. Caryopses 1.4-1.6 mm, brown. 2n =
20, 40, 60.
Paspalum plicatulum grows in prairies, along forest margins, and in disturbed
areas. Its range extends from the southeastern United States through the Caribbean
and Mexico to Bolivia, Paraguay, and Argentina.