MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 53 



gined and not webbed at the base. It grows on the alpine peaks at 

 an akitude of about 3000 m. 



' Montana: Lima, 1895, Shear, 311, J/J, J2i,j2j; Rydberg, 

 2023 ; Anaconda, 1892, Kchcy ; Bozeman, 1883, Scribncr, jpp,' 

 Old Hollowtop Pony, July 7, 1897, Rydbcrg d' Bessey, j6ji ; Mt. 

 Chauvet, July 29, jd^y, 364S. 



Yellowstone Park: Slough Creek, 1885, Tzvccdy, 630; East 

 Fork, 633. 



*Poa Cusickii Vasey, Cont. U. S. Nat. Herb, i : 271. 



A species of the P. Fendleriana group, with short panicle and 

 narrow revolute leaves. In form and size of the panicle it resembles 

 P. epilis, but it is a true bunchgrass, growing on dry hills at an 

 altitude of 2000-3000 m. 



Montana: Gallatin Peak, 1886, Tzuecdy, 103 1 (?); Lone Moun- 

 tain, 1030 (?); Gallatin Co., /oj^(?); Upper Marias Pass, 1883, 

 Canby, 3^3 in part and J77. 



Idaho: Beaver Caiion, June 27, 1895, Shear, 3op: Rxdberg, 

 2055- 



* Poa epilivS Scribn. Circ. U. S. Dept. Agric. Div. Agrost. 9: 5. 



A cespitose grass with the short panicle of P. Cusickii and P. snb- 

 aristata, but more open and more or less nodding ; spikelets com- 

 pressed ; empty glumes smooth, unequal ; flowering glumes rough- 

 hispid on the back, especially on the keel and marginal nerves. It 

 grows on mountain sides at an altitude of 2000-3000 m. 



Montana: Bridger Mountains, 1896, Rydberg, 3223 ; Flodinan, 

 131 ; Gallatin Co., 1886, Tzveedy, 1032, Old Hollowtop, Pony, July 

 7, 1897, Rydberg & Bessey, 362^. 



Yellowstone Park: Slough Creek, 1885, Tweedy, 636. 



Panicularia nervata (Willd.) Kuntze, Rev. Gen. PL 783 [111. Fl. i : 

 212] ; Poa nervata Willd. Sp. PL i: 389; Glyceria nervata 

 Trin. Mem. Acad. St. Petersb. (VI.) i : 365 [Man. R. M. 423 ; 

 Bot. Cal. 2: 307]. 



In wet meadows, on river banks, etc., up to an altitude of 2000 m. 

 Montana: Lima, iSg^, Shear, 316 : Rydberg, 2068 and 230'j; 

 Manhattan, Shear, jfiS and .^26 ; Rydberg, 2182 and 2200 ; East Galla- 

 tin Swamps, 1896, Flodman, lyo ; Spanish Basin, /// ; Elk Mts., near 

 Castle, 173 ; Alhambra, 1888, Kelsey ; Yogo, 1888, R. S. Williams^ 

 SP3 ^' Centerville, 1883, Scribncr, 403; Spanish Basin, 1896, Ryd- 

 berg, 3126, 3133 and j/57; Yogo Gulch, j^op (pale-flowered form) 



