350 POACEiE. 



two-thirds as long as the internodes; ligule lacerate, 4 mm. long; 

 blades flat, scabrous, 30-40 cm. long, 5-8 mm. wide. Panicle ex- 

 serted, j^ale, whitish green, open, pyramidal, 10-15 cm. long; rays 

 mostly in fives, slender, scabrous, flower-bearing above the middle. 

 Spikelets spreading, open, the glumes thin, scabrid, lanceolate-acu- 

 minate, first 3.5 mm. long, 1-nerved, second 3 mm. long, 3-nerved 

 below; floral glume 2.3 mm. long, bifid, toothed, the twisted awn 

 attached at the notch and projecting above its glume 1 mm., hairs 

 somewhat in two sets, as long as the floret; palea 1.7 mm. long, 

 rudiment less than 0.5 mm. long, with hairs extending in all 2 mm. 

 Washington, Sulsdorf in 1883 in Herb. Scribner. 



22. C. breviseta (A. Gray), Scribn. Mem. Torr. Club, 41 (1894). 

 0. sylvatica \sa\ breviseta A. Gray, Man. Ed. 1:582 (1848). C. 

 Pickeringii A. Gray, Man. Ed. 2: 547 (1856). 



Perennial, with creeping rootstocks. Culms slender, rather stout, 

 30-50 cm. high, each bearing about 3 leaves. Sheaths longer than 

 the internodes; ligule 3-5 mm. long, decurrent; blades flat, slight- 

 ly rough, those of the culm 8-14 cm. long, 4-5 mm. wide. Panicle 

 slightly exserted or the base included, purplish, pyramidal, inter- 

 rupted, 8-12 cm. long; rays rather stout, appressed or diverging. 

 Spikelets narrowly elliptical, acute, rough, hardly 4 mm. long; empty 

 glumes rather firm, nearly equal, oblong, pointed when flattened, 

 first 1-nerved, second 3-nerved; floral glume rough, ovate, pointed 

 when spread, nerves obscure, 2.5-3.5 mm. long, the stout straight 

 or bent awn starting below the middle and exceeding its glume a 

 very little, hairs very few and short, rudiment, including its hairs, 

 but little over 1 mm. long. 



New Hampshire (]Mt. "Washington), E. Faxon. 



New Enghmd and Canada. 



23. C. Cusickii Vasey, Contrib. U. S. Nat. Herb. 3 : 81 (1892). 

 Deyeuxia Cusickii Vasey, Coult. Bot. Gaz. 10 : 224 (1885). 



Culms from creeping rootstocks, erect, smooth, 90-120 cm. 

 high, internodes about 4 in number, besides the short ones near the 

 base. Sheaths nearly smooth, about half as long as the internodes; 

 ligule 4 mm. long, decurrent; blades of sterile shoots numerous, 

 flat, flexible, scabrid, 30 cm. or more long, 4 mm. wide, those of the 



