302 POACEiE. 



long as the floret, second as long as the floret; ilorul ghime ovate- 

 acute, 1-nerveil. 



Texas, JS'eaUcij in 18.S7 for U. 8. Dept. Agricul. 



34. S. macrospermus Scribii. iued. 



A slender erect branching annual, ^*0-40 cm. high. Sheaths 

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

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

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

 open, narrowly ovoid, 4-0 cm. long, lowest rays in halt'-wh(n'l,s of 

 4-7, the longest 1.5 cm. long, bearing two s})ikelets near the apex. 

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

 yellowi.sh, 1-nerved, linear, acute, 1.7-^.'^ mm. long; palea broad, 

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

 oval, flat, brown, translucent, l.G mm. long. 



Mexico (Jalisco), Pringle 2447. 



35. S. Virginicus (L.) Kunth, Rev. (iram. 1: 67 (1835;. Ayros- 

 tis Virfiitiica L. Sp. PI. O.*} (175:3). A. barbnta Wn^^. Syn. 1:75 

 (1805). A. lif/oralis hiuu. 111. 101(1791). Vilfa Vircji iii en Boauv. 

 Agrost. 10 (1813). 



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

 cm. high. Ligido very short, throat ciliate or glabrous; iHadcs of 

 the culm 14-10 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 1-nerved, almost keeled, ovate when s])ri'ad. first 

 glume 1.5 mm., second 2.2 mm. long; floral glume 1-uerved, ovate, 

 2.3 mm. long; palea a])out the length of its glume, folded in from 

 the back between the 2 nerves. (Jrain broadly obovoid, the very 

 thin ])ericarp separable when softened, but indistinguishable in the 

 dried state. 



Florida, Curfiss 3370; Mexico, Palmer 328. 



Virgina to Florida, Texas and IMexico, near the coast; also found 

 in the West Indies, Brazil, Africa and Australia. 



30. S. Texanus Vasey, Contrib. II. S. Nat. Herb. 1:57 (1890). 



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

 culm 4 in nund)er, longer than the interuodes; ligule a ciliate ring; 



