GRASS FAMILY ^'^'^ 



long; ,!?luiiies broad, scarious-iiiargincd. about IV2 Hues long; lemmas about 

 2 lines long, minutely scabrous, not webbed at base or pilose. 



"Washington to Idaho and California. The only specimen observed from Cali- 

 fornia is naiisen no. 2614, without locality but probably Amador Co. 



Kefs. — POA iDAHOENSis Beal, Grasses N. Am. 2: 539. 1S96. P. fiUfolia Vasoy, Contr. Nat. 

 Herb. 1: 271. 1893, not Schur. 1866. P. scahrifolia Heller, Bull. Torr. Club 24: 310. 1897, 

 base.l (111 /'. tilifolia Vasey. P. spiUmani Piper, Erythea 7: 102. 1899. P. cainllarifolia 

 Scril)!!. & Williams, V. S. Dept. Agr. Div. Agrost. Circ. 9: 1. 1899, type Hansen 2614. 



2G. P. nevadensis Vasey. Tufted perennial; culms 11/2 to 3 feet high, 

 smootli ; sheaths scabrous; ligule 2 lines long, decurrent; blades firm, involute, 

 scal)rous: panicle narroM', 4 to G inches long; spikelets 3 to 4 lines long, nar- 

 row; glumes narrow, the second \y_i lines long; lemmas smooth or scaberu- 

 lous, not pilose or webbed, II/2 lines long. 



Plains and dry meadows; San Bernardino and Los Angeles cos., through 

 eajstern California to Wyoming and Colorado. 



Locs.— Siskiyou Co., Eellcr 8070; Moulton, Griffiths <;■ Hunter 463; Honey Lake Valley, 

 Davij 3305, 3319; Cliat, Jones; Sierra Valley, Ummon 4672, 5461; Mt. Tallae, Hitehcock 

 3117; Ebbetts Pass, Brewer 1999; Bishop, Heller 8354; Antelope Valley, Davy 2246; Mohave 

 Desert, Parish 4888; San Bernardino Mts., Parish Bros. 1543. 



Ref.— PoA NEVADKXsis Vasey ; Seribn. Bull. Torr. Club 10: 66. 1SS3. 



27. P. brachyglossa Piper. Tufted perennial ; culms glalu-ous. IV2 to 3 feet 

 liigli ; sheaths smooth ; ligule of the culm leaves about 1 line long; blades stiff 

 anil firm, fiat or involute ; panicle narrow, 4 to 8 inches long, the branches 

 ascending; spikelets 4 to •"> lines long; glumes smooth, 2 to 2V2 lines long; 

 lemmas smooth or nearly so, firm. 



Dry slopes and cliffs, British Columbia to Utah and northern California. Kla- 

 math River. Bittler 467 : Lassen Co., Darij, linker tO Nutting: 'Sh. Lola. Kcinicehj 

 <& Doten 182. 



Ref. — POA BKACHYGLOSSA Piper, Proc. Biol. Soc. Wasli. 18: 145. 1905. 



28. P. pringlei Seribn. Tufted perennial: 'culms 4 to 10 inches high, the 

 base sonid inics decumbent and rlii/.onu'-like ; sheaths smooth, loose and 

 paper.y ; blades mostly basal, involute, usually not over 1 or 2 inches long, 

 smooth, the uppermost culm blade at or below the middle; panicle narrow, con- 

 tracted, few-flowered; spikelets 3 to 4 lines long, about 3-flowered ; glumes 

 equal, broad. 3-nerved, 2 to 3 lines long; lemmns 2i{> to 3 lines long, smooth or 

 scabrous, not webbed or pilose. 



High mountains of California. 



Locs. — Mt. Shasta, Copdand 3894, Goodale, Jepson; head of Trinity River, Pringle; Mt. 

 Stanford, Sonne 15; Donner Pass, Heller 7157; Butte Co., Austin 118; Mt. Goddard, Hall 4" 

 Chandler 691; Mt. Tallae, Hitcheoelc 3151; Castle Peak, Leiherg 5303; Tuolumne Meadows, 

 MeLcan; Farewell Gap, Pnrpus 5207; Mt. Wliitiiey, Coville # Funston 2066; Mt. Pinos, Hall 

 6546. 



Ref. — PoA PRINfiLEI Seribn. lUill. Torr. Club 10: 31. 18S3, type from lioaihvaters of Sacra- 

 mento River, Priniile in 1882. 



29. P. leiberg'ii Seribn. Tuflcd perennial ; rulms 3 to 8 inches high ; sheaths 

 smooth; ligule about 1 line long; blades mostl,v basal, firm, involute, smooth, 

 short; i)anicle nari'ow. 1 to 2 inches long, usually purple, the branches short, 

 appressed ; spikelets 2 to 3 lines long; glumes ll^ to 2 lines long; lemmas IV2 

 lines long, smootli or scabcrulous, not wel)bed or pilose, the nerves obscure. — 

 Differs from P. jiringlei in the smaller si)ikelets; from P. hanseni in the smooth 

 and firmer blades. 



Alpine meadows and sterile gravelly alpine flats, high Sierra Nevada at about 



