88 PAMCACK.E. 



iJeor^ia, CooJey colhrfion Mich. Agr. College in 1863 ; Alu., 

 Mohr in 1S88. 



North Caroliiiii to Floridii and TiOuisiana. 



s, P. virgatum L. Sp. Pi. 81 (1753). Var. pubiflorum Yasey, 

 Bull. Torr. Club. 13: 1(17 (188<>). 



Culms stout, 00-120 cm. high, dark at tlie nodes. Leaf-blades 

 suiooth, hairy at the throat, 30 cm. long, 7-10 mm. wide. Panicle 

 15-20 cm. long. Spikes 12-15, tlexuose, the lower 0-8 cm. long, 

 those above gradually growing shorter, rachis straight or (lexuose, 

 less than 1 mm. wide. S})ikelets flattened, soft-hairy, ovate, 

 acute, crowded in four or more rows. 2-2.5 mm. long, some of 

 them on pedicels of their own length; first and second glumes 

 3-nerved, third shorter, obtuse. 



Louisiana, A. B. Lauyloi-s. "Cuba, Mexico to Uruguay," 

 Grisvbach. 



\\XY. platyoxon Doell. Ticaf-blades 1.5-3 cm. wide; si)ikes 

 about 5, the lower 15 cm. long, rachis 3 mm. wide; spikelets oval 

 or subovate, smooth, 3 mm. long. 



Texas, .Rei'erchon 703. in 18T4, identified by Munro. now in 

 herbarium of Harvard I'ni versify. 



!t. P. caespitosum Fliigge, Monog. IGl (1810). P. Bhthjettii 

 Chapm. Kl. S. States, 571 (18G0). 



Culms slender, of few internodes, 20-40 cm. high. Leaf-blades 

 flat, acute or a(Uiminate, glabrous except at the base, 3-15 cm. 

 long, 7-10 mm. wide. Spikes 2-4, 4-G mm. long, one terminal, 

 the others distant 5-7 cm. from each other, ratrhis less than 1 mm. 

 ■wide. Spikelets minutely pul)escent, obovoid or oval, usually in 

 pairs in each row, pedicels as long as the spikelets, which are 1.5 

 mm. long, first and second glumes thin, 3-iu'rved. 



Florida, V. S. Dept. Aijt'icnl. from A. 11. Curtiss. 



Florida. Cuba, (luiana. 

 10 P. Pittieri IIacl<. MS. 



A slender tufted diffuse grass, branching near tlie base, 15-20 

 cm. high. Leaf-blades hispid, acuminate, 2-0 cm. long, about 2.5 

 mm. wide. Spikes single, rarely in pairs, slender, 2-3 cm, long, 



