HORDED. 653 



10. E. Virginicus L. Sp. PL 84 (1753). E. CaroUnicmus Walt, 

 Fl. Car. 82 (1788). 



Culms upright, firm, slender, 60-100 cm. high. Leaves 5-7 in 

 number, sheaths about the lengtli of the interuodes; ligule very short, 

 auriculate; blades flat, scabrous, 15-20 cm. long, 8-10 mm. wide. 

 Spike usually partially included by the sheath, rigid, dense, 5-15 

 cm. long, 1 cm. thick. Spikelets 2-3 at each joint, 2-4-flowered, 

 empty glumes glabrous, 12-15 mm. long, thick, spreading at the 

 base, incurved, each usually unsymmetrical, 6-8-nerved, jiointed 

 or short-awned; floral glume 8-10 mm. long, firm, hirsute, short- 

 awned. E. Canadensis var. viiiior Vasey, from Texas, belongs here. 



Rhode Island, Tweedy; New York, Clinton; Pennsylvania, Scrih- 

 ?ier3535; Michigan, i?m/ 1G3; lowa.,Hitchcoc]c; Minnesota, -4r^/mr 

 B 265; Kansas, Cassidy; Wyoming, Buffum C 41. 



Low land. New England, Minnesota, Colorado to Texas. 



Var. glaucus n. var. Glaucous throughout and seedlings also' 

 glaucous, 15-20 cm. taller than the species. 



Michigan (Agricultural College), Beal 164, 165. 



Var. submuticus Hook Fl. Bor. Am. 2:255 (1840). Awns 

 none, empty glumes acute or acuminate. This passes insensibly 

 into the species. 



Michigan, Beal; Illinois, J. Wolfe. 



11. E. Macounii Vasey, Grass. U. S. 46 (1883), name only; io 

 Bull. Torr. Club, 13: 110 (1886). E. nitidus Vasey, 1. c. 



Culms in dense tufts, 60-90 cm. high. Leaves of culms 3 or 4 

 in number, ligule 1 mm. long; blades erect, scabrous, 8-15 cm. long, 

 4-10 cm. wide. Spike erect, slender, cylindrical, exserted, 5-12 cm. 

 long, 0.5-1 cm. broad, an internode of the rachis near the middle 

 4 mm. long. Some of the lower spikelets in pairs, those above 

 often single. 1-3-flowered; empty glumes 2 to a spikelet, 8 mm. 

 long, about 1.3 mm. wide, 3-5-nerved, or for 1 or 2 spikelets there 

 may be 3 empty glumes, 1 each side and 1 in front, all alike or the 

 middle one wider, awns slender, 1.5 cm. long, some of them with a 

 short awn at one side. Spikelets when in uairs are alike or one is 

 smaller and raised on a pedicel; floral glume oblong-lanceolate, 

 scabrous, margins hyaline, ciliate; 2 lower florets of a spikelet very 



