290 POACE^. 



An erect perennial, 30-120 cm. high, culm solid as in Maize. 

 Ligule very short; blades smooth below, scabrid above, all except- 

 ino- 2 of them crowded at the base of the culms, involute, rigid with 

 very long slender points, the lower 10-70 cm. long. Panicles ter- 

 minal, exserted, thin, 15-30 cm. long, rays scattered, very slender 

 with elongated bases, the longest 3-5 cm. long. Empty glumes 

 olive-green or brown, 1-nerved, first lanceolate or awl-shaped, 2-3 

 mm. long, second ovate-lanceolate, 3.5-5.5 mm. long; floral glume 

 1-nerved, acute, 3-4 mm. long; palea oval, obtuse, as long as or 

 nearly as long as its glume. Grain spherical, shining, thick, coria- 

 ceous, nearly 2 mm. diam. 



Arkansas, U. S. Dept. Agricul.; Minnesota, Holzinger. 



New England, New York, Wisconsin, Minnesota, and south to 

 Texas. 



9. S. Floridanus Chapm. Fl. S. States, 550 (1860). 



An erect perennial, 60-120 cm. high. Ligule very short; blades 

 flat or conduplicate, scabrous on the margins, those of sterile shoots 

 30-60 cm. long, tliose on the culm 2 in number, 8-20 cm. long, 2-3 

 mm. wide, holding their width well to the abrupt tip. Panicle 

 slightly exserted, diffuse, 30-50 cm. long, rays mostly in threes, the 

 longest 7-10 cm. long. Spikelets purplish, siUj-^le at the ends of the 

 stiff rough hairlike pedicels; empty glumes obovate-lanceolate, 1- 

 nerved, first 3-5 mm. long, second 4-4.3 mm. long; floral glume 1- 

 nerved, oval, scarcely acute when spread, 4 mm. long; palea oval, 

 obtuse, reaching as high as its glume, infolded on the back between 

 the 2 nerves. 



Florida, Curtiss 3378. 



Var. Curtissii Vasey, ined. 



Leaf -blades 1-2 mm. wide; panicle more slender, glumes lanceo- 

 late, first and second 4-5 mm. long, fioral glume 3-3.5 mm. long. 



Florida, Curtiss. 



10. S. junceus (Michx.) Kunth, Eev. Gram. 1:68 (1835). 

 Agrostis jjcncea Michx. Fl. Bor. Am. 1:52 (1803). Vilfa juncea 

 Trin. Unifll. 157 (1824). 



An erect rather slender, smooth perennial, 30-70 cm. high. 

 Sheaths about the length of the internodes; ligule very short; 



