52 MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 



It is distinguished from P. Fcndleriana and P. Bucklcyana by 

 the smaller spikelet, smaller glumes, pubescence between the nerves 

 of the floral glumes and narrow panicle. Dry prairies, reaching 

 an altitude of 2000 m. 



Yellowstone Park: 1873, C. C. Parry, 2q8. 



* Poa Suksdorfii Vasey ; Beal, Grasses of N. A. 2 : 574, as synonym 



under Atropi's Suksdorfii. 



A species of the Bnchlexana group, 10-15 cm. high, densely tufted ; 

 basal leaves rigid, conduplicate ; panicle small and spike-like. The 

 culm exceeds the basal leaves by about one-half. It grows on high 

 mountains at an altitude of 3000 m. 



Montana: Lima, 1895, Shear, ji 2. 



Poa longiligula S. & W. Circ. U. S. Dept. Agric. Div. Agrost. 9: 



3; Poa Californica Coult. Man. R. M. 421, in part; not Scribn. 



It differs from P. Fcndleriana {P. Californica Coulter, mainly) 

 in the long and decurrent ligules, larger spikelets and denser pubes- 

 cence on the flowering glumes. On exposed mountain sides at an 

 altitude of 2000-3000 m. 



Montana and Idaho: Mt. Chauvet, July 29, 1897, Rydberg 

 & Bessev, jS^g and jdjo. 



Yellowstone Park: Slough Creek, 1885, Tzvccdy, 6ji ; Mam- 

 moth Hot Springs, 1885, Tweedy, 62 g. 



*Poa longepedunculata Scribn, Bull. U. S. Dept. Agric. Div. 



Agrost. II : 54 ; Poa Fcndleriana spicatai^'^s^y^ Scribn., Bull. U. 



S. Dept. Agric. Div. Agrost. 5:31; Poa andina spicata Vasey, 



Bot. Wheeler Exp. 290 ; not P. spicata L. 



Differs from P. Fcndleriana in its taller habit, and interrupted 

 panicle which is longer, narrower and greener. In meadows at an 

 altitude of 2000 m. 



Montana: Townsend, 1897, Pydherg, 21 jS; Silver Bow, 

 21 12; Manhattan, July 17, 21^8. (These specimens were deter- 

 mined at the United States Department of Agriculture as P. Fcnd- 

 leriana spicata, but they differ from the Colorado specimens in the 

 larger and shining spikelets. It may be a distinct species.) 



*Poa subaristata Scribn. ; Beal, Grasses of N. A. 2 : 533. 



It is characterized by the tufted habit, resembling somewhat P. 

 Fcndleriana, but leaves involute, panicle very short and crowded, 

 floral glumes long (6 mm.) and narrow, acuminate, scarious-mar- 



