242 DAVENPORT ACADEMY OF NATURAL SCIENCES. 



altitude 6,500. Open park, common. Xo. 156. New Castle, altitude 4,019. 

 Near spring. Xo. 137. 



P. nemoralis L. Xew Castle, altitude 4,019. In pine woods near streams 

 and in canons. No. 155. Rapid Creek Park, altitude 7,500. Common in 

 open parks. Xo. 113. Dome Lake, Sheridan County, altitude 9,500. Open 

 pine woods and moist places. No. 112. West branch of the Big Goose 

 River and near the road to Shoshone Basin, altitude 8,500. Common in 

 open pine woods. No. 68. 



P. nevadensis Vasey. Sheridan County, Dome Lake Road. Geranium 

 Park, altitude 7,500. This beautiful species produced an abundance of 

 good forage and was common along the roadside. No. 132. Rapid Creek 

 Park, Sheridan County, altitude 7,500. Common in open places. No. 230. 

 New Castle, altitude 4,019 ; nearspring. No. 131. In open woods and parks. 

 A beautiful and productive grass growing in large quantities along the road- 

 side. 



P. wyonitigensis Scribn. sp. nov. A rather stout, erect, glabrous peren- 

 nial 4-7 dm. high with flat leaves and narrow, densely-flowered panicles 

 10-20 cm. long. Sheaths striate, smooth, the lowermost loose and more or 

 less scarious ; ligule hyaline acute 4-6 mm. long, leaves rather soft, 8-12 cm. 

 long, 3-5 or. 6 mm. wide, very smooth excepting at the rather abruptly 

 pointed apex. Spikelets broadly lanceolate, acute, 5-7 flowered, 8-10 mm. 

 long ; empty glumes very acute, rather broadly lanceolate, strongly scab- 

 rous on the keels above and minutely scabrous all over, the ist about 4 mm. 

 long and 3-nerved, the 2nd broader than the first, 3-5nerved and about 5 

 mm. long ; flowering glumes ovate oblong, the first one usually 5-5 mm. 

 long, usually erose at the obtuse apex, sometimes shortly mucronate by the 

 prolongation of the midnerve, scabrous on the back with a somewhat crisp 

 pubescence towards the base ; the hairs extend on to the callus where they 

 are about 0-5 mm. long. Palea shorter than the glume, strongly scabrous 

 on the prominent keels. 



Allied to Poa nevadensis but distinguished by its broader, less rigid, flat 

 and glabrous leaves and larger flowering glumes, which are conspicuously 

 pubescent towards the base. Also closely allied to Poa Biickleyana but the 

 leaves are broader, less flaccid and smooth, not scabrous as in that species, 

 the spikelets more numerously flowered (2-3-flowered in P. Biickleyana), the 

 florets more distant and the flowering glumes are more distinctly pubescent 

 near the base. Buckley descriljes the flowering glumes of P. Biickleyana as 

 being naked at the base. 



In clay soil above Big Horn, Sheridan County, Wyoming, altitude 6,000- 

 7,800. No. 192. L. H. Pammel, July, 1897. 



F. prateufis L. Hastings, altitude 1,943. Common in meadows near 

 pump-house. No. 94, No. ir6. Oxford, altitude 2,085. One of the finest lawns 

 along the B. & M. R. R. in Nebraska occurs at Oxford, where this species is 

 used. No. 181. Rapid Creek Park, Sheridan County, altitude 7,500; in 

 parks. No. 126. 



