GRASSES. 347 



about 2 feet high. Leaves lanceolate, acuminate at the base, ciliate ; sheaths ciliate ; 

 panicle of stout rigid alternate spreading branches bearing the more or less 

 crowded, pediceled, ovate, acute spikelets on one side, single or in pairs; flowering 

 glume transversely rugose. 



EAST AND WEST INDIES, BRAZIL. 



ALABAMA: Fugitive on ballast, Mobile, September, 1891. 



Type locality not ascertained. 



Panicum gymnocarpon Ell. Sk. 1:117. 1817. 



Chap. Fl. 573. Coulter, Coutr. Nat. Herb. 2 : 509. 



Louisianian area. Coast of Georgia and Florida, west to Texas. 



ALABAMA: Lower division Coast Pine belt. Alluvial forests. Mobile County, 

 Pierce's Landing; not frequent; perennial. 



Type locality: "From specimens collected near Savannah, by Dr. Baldwin." 



Herb. Geol. Surv. Herb. Mohr. 



Panicum reperis L. Sp. PI. ed. 2, 1 : 87. 1762. CREEPING PANICUM. 



Panicum arenarium Brot. Phyt. Lus. 1 : 15. 1816. 



Chap. Fl. Suppl. 666. Coulter, Contr. Nat. Herb. 2 : 505. 



EUROPE, MEXICO, CANARY ISLANDS. 



Louisianian area. Alabama and Texas to Southeast Mexico. 



ALABAMA : Sandy shores. Mobile County, mouth of Mobile River, swampy edge 

 of the river bank, forming dense tussocks. Baldwin County, eastern shore of Mobile 

 Bay, damp sands. July to September; frequent; perennial. 



Type locality: "Hab. in Hispania? inde missum a Claud. Alstromoer." 



Economic uses : Valuable sand binder. 



Herb. Geol. Surv. Herb. Mohr. 



Panicum littorale Mohr; Vasey, Bot. Gaz. 3 : 106. 1878. 

 Panicum repens confertum Vasey, Contr. Nat. Herb. 3 : 28. 1891. 

 P. gouini Fourn. Mex. PL 2 : 28. 1881. 

 Coulter, Contr. Nat. Herb. 2 : 505. 



MEXICO. 



ALABAMA: With the above, frequent; perennial; from long running rootstocks. 



Type locality : "Mobile, Ala. * * * Drifting sands of the Gulf coast." 



Herb. Geol. Surv. Herb. Mohr. 

 ' Panicum melicarium Michx. Fl. Bor. Am. 1 : 50. 1803. GAPING PANICUM. 



Panicum debile Poir. Encycl. Suppl. 4 : 283. 1816. Not Ell. % 



P. hians Ell. Sk. 1 : 118. 1817. 



Chap. Fl. 573. Coulter, Contr. Nat. Herb. 2 : 504. 



MEXICO, BRAZIL. 



Louisianian area. North Carolina to Florida, west to Texas. 



ALABAMA: Central Prairie region to Coast plain. Low muddy places, ditches. 

 Lee County, Auburn (Baker <? Earle). Montgomery County. Hale County, Gallion. 

 Wilcox, Monroe, Mobile, and Baldwin counties. Frequent; June to August; per- 

 ennial. 



Type locality: " Hab. in Carolina, Georgia." 



Herb. Geol. Surv. Herb. Mohr. 



Panicum depauperatum Muhl. Gram. 112. 1817. IMPOVERISHED PANICUM. 



Gray, Man. ed. 6, 633. Chap. Fl. 576. Scribner, Grass. Tenn. 2 : 49, 1. 13, f. 49. 



Canadian zone, Alleghenian to Louisianian area. Newfoundland, Nova Scotia, 

 Ontario, New England, west to Minnesota and Nebraska, south to Florida and Texas ; 

 Arkansas. 



ALABAMA: Central Prairie region. Open woods and dry copses. Metamorphic 

 hills. Lee County, Auburn (F. S. Earle). Montgomery County. Infrequent; per- 

 ennial. 



Type locality : " Pennsylvania, Carolina." 



Herb. Geol. Surv. Herb. Mohr. 



Panicum neuranthum Griseb. Cat. PI. Cub. 232. 1866. NERVED PANICUM. 



Perennial ; culm 1 to 1 feet high, more or less pubescent, branched from the base; 

 branches erect, scarcely longer than the leaves; leaves narrow, linear-lanceolate, i to 

 -fa inch wide and from 4 to 5 inches long, acuminate, acute, snioothish, strongly many- 

 nerved; lignle a ring of stiff hairs; sheaths about as long as the intemodes, villous 

 from minute papillae; panicles mostly included, short, contracted; spikelets on short 

 erect pedicels, obtuse ; first glume small, smooth ; second and third glumes strongly 

 7 to 9 nerved, pubescent. Readily distinguished from P. anyustifoliwm by the nar- 



