MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 33 



be found. It may be distinct but it is rather unsafe to separate it 

 until it is better known. The following specimens belong here : 



Montana : Bozeman, 1895, Shear, 437 : Rxdhcrg, 221S and 2221 ; 

 Townsend, July 15, 21^1; Logan, Shear, jio; Alhambra, 1888, 

 Kclsey ; Musselshell River, 1896, Rydherg, 343 j ; Sweet Grass 

 Canon, 3442; Cliff Lake, 1897, Rvdhcrg & Bcssey, 3573. 



Yellowstone Park: Mud Springs, 187 1, Huyden; East De 

 Lacy's Creek, 1897, Rydbcrg <£r Bcssey, 3377; Upper Madison, 



3575- 



At high altitudes, 2500 m. or more, in canons and on mountain 

 tops, there is found a form with short tufted leaves and small pan- 

 icles. To this belong the following specimens : 



Montana: Long Baldy, Little Belt Mts., Aug. 19, 1896, F/od- 

 man, 28 ; Rydberg, 33po; Belt Mts., 1886, R. W. Anderson ; Sweet 

 Grass Canon, 1896, Rydberg, 3444. 



Calamagrostis purpurascens R. Br. ; Richards. Frankl. Journ. 731 ; 

 Kearney, Bull. U. S. Dept. Agric. Div. Agrost. 11 : 19; Cala- 

 niagrosfis sylvatica Gray, Proc. Am. Acad. 6 : 80 [Bot. Cal. 2 : 

 182] ; not DC. ; Deyeuxta sylvatica Vasey, Descr. Cat. Grasses 

 U. S. 51 [Man. R. M. 414]"^. 

 A subalpine species, growing in big bunches on open ridges and 



mountain sides at an altitude of 2000-3000 m. 



Montana: Baldy, near Bozeman, 1895, Shear, 468; Rydberg; 



2224; Elk Mts., near Black Hawk, 1896, Flodnian, 36; LittleTBelt 



Mts., near the pass, 37 ^ Belt Cafion, 1887, R. S. Williams, 3g6; 



White Sulphur Springs, 1883, Scribiicr, 362; Spanish Creek, 



Tivccdy, 1022; Little Belt Mts., 1896, Rydberg, 33i3y^ and 3373; 



Spanish Peaks, jo/^; Elk Mountains, j.?p(5; Blackfoot River, 1883, 



Canby, 362 ; Flathead Region, H. B. Ayres. 



* Calamagrostis Montanensis Scribn. Vasey, Contr. U. S. Nat. 



Herb. 3 : 82 [Kearney, Bull. U. S. Dept. Agric. Div. Agrost. 11 : 



20]. 



A low species with almost filiform leaves, strongly compressed 

 spikelets, sharply keeled empty glumes, and a stout bent awn which 

 about equals the empty glumes. It grows on dry bench lands up to 

 an altitude of 2000 m. 



Montana: Columbia Falls, 1894, R. S. Williams, 846: Sixteen 

 Mile Creek, 1883, Scribner, 363 ; Grasshopper Valley, 1880, Wat- 

 son; Judith Gap, 1882, R. W. Springer, XXIV. 



