AVENEiE. 369 



Culms 20-30 cm. high; blades soft, often flat; empty glumes 

 about 5 mm. long; floral glume 4.5 mm, long. 



Alaska, Elliott \ Colorado, Letterman. 



Var. Bottnica (Walil.) Vasey ined. Aira Bottnica Walil. Fl. 

 Lapp. 1:36, t. 4: (1812). D. Bottnica Trin. Fund. Agrost. 158 

 (1820). 



A plant with a long panicle and projecting awns. Empty glumes 

 3-uerved, 6 mm. long; floral glume oval, truncate, irregularly 

 toothed, often 7-nerved. 



Alaska, Harrington in 1871-2; Oregon, Hoivell, Cusiclc. 



A note in Dr. J. T. Eotlirock's Sketch of the Flora of Alaska, 

 in Smithsonian report 458 (1867), speaks of specimens which he 

 had collected in that territory, as follows: 



"•In looking over the specimens of A. ccBspitosa in Herb. Gray 

 I find one from the Sandwich Islands and another from Ft. Van- 

 couver, both of which appear identical with our forms from Sitka. 

 They having been authoritatively named by Colonel Munro as 

 Aira ccespitosa var Bottnica, I have labelled the Sitkan specimens 

 in accordance with his determination. I find a specimen in Herb. 

 Gray similar to the Sitkan ones marked (but from Ounalaska) as A. 

 ccespitosa var. longiflora." 



Var. brevifolia (Bieb.) Vasey ined. Aira hrevifolia Bieb. Fl. 

 Taur. Cauc. 3: 63 (1819). Blades soft, rather firm, 6-10 mm. long. 



Var. Confinis. Vasey ined. Ligule 8-10 mm. long; spikelets 

 about 5 mm. long. 



California, Palmer 231. 



Var. longiflora. 



Panicle ample; spikelets 3-flowered, awns projecting; empty 

 glumes nearly equal, 3-nerved ; floral glume 5-nerved. 



Vancouver Island, John Macoun 1887. 



Var. montana (Schur.) Vasey. D. montana Schur, Enum. PI. 

 Transs. 753 (1866). 



Leaf blades thick and coarse, involute, and awns projecting. 



Arizona, RotJiroch 23. 



Rocky Mountains. 



Var. maritima Vasey, Bull. Torr. Club, 15: 48 (1888). 



