FESTL'CE.E. 553 



Yermont, Frill gh in 187T; Eocky Mountains, //a// and Har- 

 hoiw 247; Montana, Tweedy 6-47, Canby c(- Scribner, 304, 369; 

 Colorado, Lettermaii 12% 35, 37, 62 in 1885-86 for U. S. Nat. 

 Herb. 



Var. glauca (Vahl). Poa (jlanca Yahl, Fl. Dan. f. 064{l1'd0). 

 P. ccesia J. E. Smitli, Engl. Bot. t. 1710 (1793). P. aspera Gau- 

 diu, Alpina3:38 (1808). 



Culms 20-60 cm. high, firm, flattened; ligule obtuse, 2 mm. 

 long; blades 3-4 in number. Panicle erect, 3-6 cm. long, sub- 

 secund andspikelike, or 10-12 cm. long and open, the longest rays 5 

 cm. long. Spikelets 2-4-flowered, part of them subsessile; empty 

 glumes oval, acute, first 3.3 mm. long, second 3.5-4 mm. long; 

 floral glume 3.7-4 mm. long; palea 3.5 mm. long. Anthers 1.7 

 mm. long. 



New Hampshire, C. E. Faxon ; Montana, Williams; Arizona, 

 Pusby 899. 



Maine to Oregon and Rocky Mountains. 



Var. firmula Host. Gram. Aust. 2:f. 71 (1804). P. cmsia var. 

 strictior A. Gray, Man. Ed. 5: 629 (1868). 



Culms 15-30 cm. high, flattened; panicle contracted or open, 

 grayish jiurple; empty glumes subequal, broad, 2-2.7 mm. long; 

 floral glume 2.5 mm. long; palea 2.5-2.7 mm. long; anthers 1.2 

 mm. long. 



Vermont. Faxon, Hosford, Priiujle ; Micliigan (Keweenaw 

 Co.), Farwell ; Canada, Faxon; ^Minnesota, Arfliur ; Montana, 

 Canby £ Scribner 387, 389, WilUains. 



38. P. Wolfii (Vasey), Scribn. Bull. Torr. C'hib, 21:^. 228 

 (1894). P. alsodes A. Gray, var. Wolfii Vasey ined. 



Culms slender, 60-80 cm. high. Blades of sterile shoots 25-35 

 cm. long, 1.5-2 mm. wide; ligule 1-1.3 mm. long; blades of culm 

 5-10 cm. long, acuminate. Panicle lax, 7-15 cm. long, rays in 

 distant pairs, slender, the longest 7-10 cm. long, bearing 4-7 spike- 

 lets near the apex. Spikelets open, 6.7 mm. long, 3-4-flowered,' 

 ■empty glumes oval when s^jread, acute, 3-nerved, first 3.5 mm. long, 

 second 4 mm. long ; floral glume 4.4-5 mm. long, pubescent for 

 most of its length, elliptical, acute; palea 3.5 mm. long, puberulent 



