IIOKDE^. 663 



10. E. Virginicus L. Sp. PI. 84 (175.'}). E. Carolinianus Walt. 

 Fl. Car. 82 (1788). 



Culms upright, firm, slender, 00-100 cm. high. Leaves 5-7 in 

 numher, sheaths about the length of the interuodes; ligulo very short, 

 auriculate; blades Hat, scabrous, 15-20 cm. long, S-10 mm. Avide. 

 Spike Tisually partially included by the sheatli, rigid, dense. 5-15 

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

 enij)ty glumes glabrous, 12-15 mm. long, thick, spreading at the 

 base, incurved, each usually unsymmetrical, 6-S-nerved, j)ointed 

 or short-awned ; lloral glume 8-10 mm. long, linn, hirsute, short- 

 awned. E. Canadensis var. minor V'asey, from Texas, belongs here. 



lihode Island, Tweedy; New York, Clinton; Pennsylvania, iS>r/i- 

 ?/c;'3535; Michigan. //«'«/ 1 03; Jowa, Ilifrlirork; M'mncsotu, Arthur 

 li 205; Kansas, Cassidi/; Wyoming, liuffuni C 41. 



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



Var. glaucus n. vai-. Glaucous throughout and seedlings also 

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



Michigan (Agricultural College), Beat 1G4, 105. 



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

 none, empty glumes acute or acuminate. This passes insensibly 

 into the species. 



Michigan, Heal; Illinois, J. Wolfe. 



11. E. Macounii Vasey, (irass. IT. S. 40 (1883), name only; in 

 Bull. Torr. Club, 13: 1H» (1880). /;. nilidns Vasey, 1. c. 



Culms in dense tufts, 00-!»0 cm. high. Leaves of culms 3 or 4 

 .n inimber, ligulc 1 mm. long; blades erect, scabrous, S-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 spikeb'ts in pairs, those above 

 often single. 1-3-tlowered; 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 emjity 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 pairs arc alike or one is 

 smaller and raised on a })edicel; lloral glume oblong-lanceolate, 

 scabrous, margins hyaline, ciliate; 2 lower llorets of a si)ikelet very 



