AVENK^. 369 



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

 about 5 mm. long; lloral glume 4.5 mm. long. 



Aliisku, Elliott; Colorado. Letterman. 



Var. Bottnica (Wahl.) Vasey ined. Aira liottnica Wuld. Fl. 

 Lapp. 1:36, /. 4 (1813). D. JJoftnica Triu. Fund. Agrost. 158 

 (1830). 



A i)lant with a long panicle and projecting awns. Empty glunu'S 

 3-nerved, 6 mm. long; lloral glume oval, truncate, irregularly 

 toothed, often T-nerved. 



Alaska, Harrington in 1871-2; Oregon, Ilowetl, Cimch. 



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

 in Smithsoiiian rej)ort 458 (18G7), speaks of specimens which he 

 had (!()lleeted in that territory, as follows: 



"In looking over the specimens of A. ca>xpitosa in Herb. Gray 

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

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

 They having been authoritatively named l)y Colonel Muuro as 

 Aira ca^spitosa 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 Onnalaska) as A. 

 ccmpitosa var. lonr/i flora." 



Var. brevifolia (Hieb.) Vasey ined. Aira brevifolia Hieb. Fl. 

 Taur. Cauc. 3: 03 (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. T53 (18GG). 



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



Arizona. Rothrock 23. 



Kocky Mountains. 



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



