48 MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 



* Poa Wheeleri Vasey ; Rothrock, U. S. Geol. Surv. 6: 291. 



It resembles in habit somewhat P. -pratensis or still more the east 

 ern P. hrcvifoUa Muhl. : but the flowers are acute and not webbed 

 at the base. In meadows at an altitude of 2000-2500 m. 



Montana : Bozeman Cafion, 1895, Shear, ^yS and^po; Spanish 

 Basin, 1896, Flodman, 160 and i6j ; Little Belt jMts., 162 and 

 164: Elk Mts., 161; Indian Creek, July 22, 1897, Rydbcrg ($; 

 Bessey, 362 j ; Spanish Basin, 1896, Rydbcrg, joij, 301 g, 3020^ 

 3021}^, 3026,3031 ; Bozeman, 3oog; Elk Mts., j^pj.- Little Belt 

 Mts., jj'i'(5 and J J 7p; Gallatin County, 1886, Tzcccdy, io2g. 



Yellowstone Park : East DeLacy's Creek, August 10, 1897, 

 Rydbcrg- tt- Bcssey, 363"/ and 3642; Electric Peak, August 18, 3644. 



* Poa Vaseyana Scribn. ; Beal, Grasses of X. A. 2 : 532. 



Scarcely distinct from P. Whcclcri, differing onh^ in the larger 

 spikelets and the longer glumes. It growls in locations similar to the 

 preceding. 



Montana: Little Belt Mts., 1896, Flodman, 137: Spanish Basin, 

 /j-p; June 28, i8(^'j , Pvdbcrg- d- Bcsscy, 3633,3638 and 363^ : 1896^ 

 Rvdbcrg, 3134; Little Belt Pass, 3334: Yogo Baldy, 3423. 



Yellowstone Park : 1884, Tweedy, 2j6. 



Poa pratensis L. Sp. PL 67 [Man. R. M. 422: 111. Fl. i: 204; 



Bot. Cal. 2 : 312]. 



Common in meadows up to an altitude of 2000 m. It is one of the 

 most valuable forage plants. 



Montana : Red Rock, 1895, Shear ,32() : Rydbcrg, 2og2 : Melrose, 

 2 1 01 and 2102; Shear, 360: Deer Lodge, 3/6: Rydbcrg, 2133; 

 Townsend, 2i6j; Shear, 400; Manhattan, Rydbcrg, 2181 ; Boze- 

 man, 2213 and 2217; Bozeman Caiion, Shear, 48^; Mystic Lake, 

 484; Melrose, Rydbcrg, 22^3: Lima, 2310: Little Belt Mts., 1896, 

 Flodman, 132 and 133: Spanish Basin, 133 and T34: Alhambra, 

 1890, Kclsey ; Great Falls, 1890, R. S. Williams, 374: Spanish 

 Basin, 1896, Rydbcrg, 3021, 3060, 3062 ; Elk Mts., ji-i'd; Sheep 

 Creek, 3300, 3302, 3303 ; Little Belt Mts., 3313 ,3326y> and 3344; 

 Yogo, 3407; Jack Creek, July 12, 1897, Rydbcrg d- Bcssey, 3641 ; 

 Flathead Region, 1883, H. B. Ay res. 



Yellowstone Park : 1884, Tweedy, 234. 



A form with strict tall stem, broad leaves and large often more 

 acutish flowers is found along streams. To this the following 

 specimens are referred : 



