302 POACEiE. 



long as the floret, second as long as the floret; floral glume ovate- 

 acute, l-nerved, 



Texas, Nealley in 1887 for U. S. Dept. Agricul. 



34:. S. macrospermus Scribu. ined. 



A slender erect branching annual, 20-40 cm. high. Sheaths 

 subcompressed, sparingly villous at the throat; ligule a ciliate ring, 

 also ciliate above and below to a varying degree, 2-4 cm. long, 1-2 

 mm. wide, upper blades narrow, 1 cm. long. Panicle exserted, 

 open, narrowly ovoid, 4-6 cm. long, lowest rays in half-whorls of 

 4-7, the longest 1.5 cm. long, bearing two spikelets near the apex. 

 First glume awl-shaped, 1 mm. long, second and floral glume 

 yellowish, 1 -nerved, linear, acute, 1.7-2.2 mm. long; palea broad, 

 oval, about as long as its glume, split by the maturing ovary. Seed 

 oval, flat, brown, translucent, 1.6 mm. long. 



Mexico (Jalisco), Pringle 2447. 



35. S. Virginicus (L.) Kunth, Rev. Gram. 1: 67 (1835). Agros- 

 tis Virginica L. Sp. PI. 63 (1753). A. harhata Pers. Syn. 1:75 

 (1805). A. littoralis Lam. 111. 161 (1791). Vilfa Virginica Beauv. 

 Agrost. 16 (1812). 



A smooth erect or decumbent perennial branching grass, 15-40 

 cm. high. Ligule very short, throat ciliate or glabrous; blades of 

 the culm 14-16 in number, convolute or involute when dry, rather 

 rigid, ascending, distichous, the longest 5-15 cm. long, 3-5 mm. 

 wide. Panicle spikelike, dense, 3-7 cm. long, 5-7 mm. wide. 

 Empty glumes l-nerved, almost keeled, ovate when sj)read, first 

 glume 1.5 mm., second 2.2 mm. long; floral glume l-nerved, ovate, 

 2.3 mm. long; palea about the length of its glume, folded in from 

 the back between the 2 nerves. Grain broadly obovoid, the very 

 thin pericarp separable when softened, but indistinguishable in the 

 dried state. 



Florida, Curtifis 3376; Mexico, Palmer ^^Q. 



Virgiua to Florida, Texas and Mexico, near the coast; also found 

 in the West Indies, Brazil, Africa and Australia. 



36. S. Texanus Vasey, Contrib. U. S. Nat. Herb. 1:57 (1890). 

 A glaucous tufted perennial, 30-40 cm. high. Sheaths of the 



culm 4 in number, longer than the internodes; ligule a ciliate ring; 



