Rough Hair Rosette Grass

Panicum polycaulon Nash, Bull. Torrey Club 24: 200. 1897
Panicum dichotomum glabrescens Grriseb. Fl. Brit. W. Ind. 553. 1864.
Vernal phase similar to that of P. ciliatum; culms rarely more than 20 cm. high, glabrous, but pilose in the long-exserted panicle; leaf -sheaths sparingly ciliate; blades on the average narrower than those of P. ciliatum; spikelets 1.5-1.6 mm. long (exceptionally as much as 2 mm. long), 0.8 mm. wide, obovate, blunt, glabrous; first glume one third to half the length of the spikelet, subacute; second glume and sterile lemma strongly nerved; fruit 1.4 mm. long, 0.8 mm. wide, elliptic, subacute, not umbonate.
Autumnal phase in flat, soft mats, similar to those of P. xalapense, but smaller.
Type locality: Tampa, Florida.
Distribution : Florida to southern Mississippi and the Greater Antilles.

Panicum strigosum Muhl. ; Ell. Bot. S. C. & Ga. 1 : 126. 1816
Panicum laxiflorum pubescens Vasey, Contr. U. S. Nat. Herb. 3: 30. 1892. Panicum longipedunculatum Scribn. Bull. Tenn. Exp. Sta. 7: 53. 1894.
Vernal phase similar to that of P. ciliatum, but having sparsely pilose culms and leafsheaths, bearded nodes, and blades on the average a little wider and more or less pilose on both surfaces; panicles larger, with pilose axis and branches, bearing more numerous, smaller, glabrous spikelets, the latter 1.3-1.5 mm. long, 0.7 mm. wide, obovate, less turgid than in other species of this group; first glume one third to half the length of the spikelet; second glume and sterile lemma equal, faintly nerved; fruit 1.3 mm. long, 0.6-0.7 mm. wide, elliptic, subacute, not umbonate.
Autumnal phase a dense mat, with panicles scarcely rising above the leaves.
Type locality : South Carolina.
Distribution: Virginia and Tennessee to Florida and eastern Texas, and south to Colombia; Cuba, Santo Domingo, and Jamaica.