62 MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 



Bessey, j6pj ; Spanish Basin, June 2^,j6p2; Pony, July 6, j6pi ; 

 Elk Mts., 1896, Flodman, 2jp: Little Belt Mts., 241; Rydberg, 

 3316 ; Spanish Basin, 308^; Nevada Creek, 1882, Canby, 388. 



Yellowstone Park: 1895, 7^. Tzveedy, 623. 



Idaho: Henry's Lake, July 31, 1897, Rydbci-g dc Besscy, 36^0. 



* Agropyron Vaseyi Scribn. & Smith, Bull. U. S. Dept. Agric. Div. 



Agrost. 4 : 27. 



It differs from A. diver gens by its shorter and narrower leaves, 

 rigid and wiry culms and smaller spikelets. 



Montana: Townsend, 1895, Rydberg, 216^: Dillon, 22pg; Lima, 

 Aug. 5, 2301 : 1880, Watson, ^61. 



* Agropyron Richardson! (Trin.) Schrad. as a synonym under Triti- 



cuni Richardsonii Trin., Linnaea, 12 : 467 ; Agrofyriini unilatcr- 



ale Cassidy, Bull. Colo. Exp. Sta. 12 : 63 : not Beauv. 



Differs from A. caninuni by its stout erect spike and longer awns. 

 On bench lands at an altitude of 1000-2000 m. 



Montana: Elk Mts., near Black Hawk, Aug. 5, 1896, Flod- 

 man, 231; Cliff Lake, July 27, 1897, Rydberg- d- Bessey, 3706; 

 Sun River Canon, 1887, R. S. Williams, j8p: Little Belt Mts., 

 1896, Rydbe?-g,33j2; Smith River, 1883, Scribner, 423a. 



* Agropyron Richardsonii ciliatum Scribn. & Smith Bull. U. S. 



Dept. Agric. Div. Agrost. 4: 29. 1897. 



Leaf sheath and blade pilose pubescent. At an altitude of 1300 m. 



Montana: Belt AEountains, 1883, Scribncr, 422. 



Agropyron caninum (L.) R. & S. Syst. 2: 756 [Man. R. M. 426; 



111. Fl. i: 228] ; Triticum caninuni L. Sp. PI. 86. 1753 [Bot. 



Cal. 2: 324]. 



Common in meadows and on bench lands to an altitude of 2000 m. 



Montana: Manhattan, 1895, Shear, 416: Rydberg, 2176 ; Boze- 

 man. Shear, 432; Melrose, Aug. 1, 342; Cliff Lake, July 27, 1897, 

 Rydberg & Bessey, 3710 : Forks of the Madison, July 26, j/op; 

 East Gallatin Swamps, 1896, Rydberg, 3183 and 3igi ; Flodman, 

 223; Spanish Basin, i-Oi?,- Rydberg, 3138. 



Yellowstone Park : Cache Creek, 1885, Tzceedy, 623. 



Idaho : Mt. Chauvet, July 27, 1896, Rydberg tf- Bessey, 3/'04}4. 



* Agropyron tenerum Vasey, Coult. Bot. Gaz. 10: 258 [111. Fl. i: 



227]. 



Differs from A. violacetini by the long and slender spike and the 



