Panicum millegrana Poir.

Panicum millegrana Poir. in Lam. Encyc. Suppl. 4: 278. 1816
Panicum hirsutum Lam. Encyc. 4: 741. F 1797. Not P. hirsutum Sw. 1797.
Panicum patentissimum Desv.; Poir. in Lam. Encyc. Suppl. 4: 283. 1816.
Panicum rugulosum Trin. Gram. Pan. 195. 1826.
Panicum Sellowii Nees, Agrost. Bras. 153. 1829.
Panicum Beyrichii Kunth, Rev. Gram. 231. 1830.
Panicum lasianthum Trin. Ic. pi. 245. 1830.
Panicum puberulum Trin. Mem. Acad. St.-Petersb. VI. 3 2 : 277. 1834.
Panicum dispersum Trin. Mem. Acad. St.-Petersb. VI. 3 2 : 282. 1834.
Panicum pilosum leiogonum Rupr.; Galeotti, Bull. Acad. Brux. 9 2 : 239, hyponym. 1842.
Panicum Sellowii longevaginatum Rupr.; Galeotti, Bull. Acad. Brux. 9 2 : 239, hyponym. 1842.
Panicum V alenzuelanum A. Rich, in Sagra, Hist. Cuba 11: 304. 1850.
Panicum probandum Steud. Syn. Gram. 76. 1854.
Panicum r.ugulosum hirtiglume Griseb. Cat. PI. Cub. 233. 1866.
Panicum rugulosum pubescens Doell, in Mart. Fl. Bras. 2 2 : 259. 1877.
Panicum rugulosum subvelutinum Doell, in Mart. Fl. Bras. 2 2 : 259. 1877.
Plants perennial, spreading; culms sparingly branching, 0.5-1 meter high, ascending from a decumbent base, softly pubescent to glabrous ; leaf -sheaths ciliate and with a dense ring of pubescence at the summit, otherwise papillose-pilose to glabrous; ligule membranaceous, scarcely 0.3 mm. long; blades ascending or spreading, thin, ovate-lanceolate, 4-15 cm. long, 243
10-30 mm. wide, somewhat asymmetric at the rounded or slightly cordate, sometimes ciliate, base, softly pubescent, or sometimes velvety, on both surfaces to glabrate except near the margin and at the base; panicles short-exserted, finally loose and rather few-flowered, 10-20 cm. long, about two thirds as wide when expanded, the rather few, slender branches stiffly ascending or spreading, bearing toward the ends short, appressed branchlets with 1-3 rather short-pediceled spikelets; spikelets 2-2.3 mm. long, 1-1.2 mm. wide, obovate, obtuse, turgid, at maturity olivaceous or brown, glabrous or more commonly papillose-hispidulous; first glume about two thirds as long as the spikelet, acute ; second glume slightly shorter than the sterile lemma, exposing the summit of the fruit at maturity, both 5-nerved, in glabrous spikelets the nerves bordered by interrupted rows of minute papillae; fruit 1.9-2.1 mm. long, about 1 mm. wide, elliptic, obscurely pointed, papillose-roughened, becoming dark-brown at maturity.
Type locality: Cayenne.
Distribution: Mexico and the West Indies to Paraguay.