Plants perennial; aquatic to semi-aquatic, conspicuously rhizomatous or
stoloniferous. Culms 80-150 cm, erect; nodes glabrous. Sheaths
glabrous or sparsely pubescent; ligules 1-3 mm; blades to 35 cm
long, 2-7 mm wide, flat, glabrous above, pubescent below, especially basally.
Panicles terminal, with 5-8 racemosely arranged branches; branches
3.5-11 cm, divergent to erect; branch axes 0.6-1.1 mm wide, glabrous, terminating
in a spikelet. Spikelets 2.2-2.7 mm long, 1-1.4 mm wide, paired, appressed
to or divergent from the branch axes, elliptic, glabrous, light brown. Lower
glumes absent; upper glumes glabrous, 3-veined; lower lemmas
glabrous, 5-veined; upper florets glossy chestnut brown. 2n = unknown.
The range of Paspalum wrightii extends from Cuba and Campeche, Mexico,
to Bolivia, Paraguay, and Argentina. It is now established in the Flora
region, growing along wet, roadside ditches, primarily along the Gulf coast of
Texas.
