GRASS FAMIL1 159 



long; glumes broad, scarious-rnargined, about 1^ lines 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 Hansen no. 2614, without locality but probably Amador Co. 



Ref s. POA IDAHOENSIS Beal, Grasses N. Am. 2 : 539. 1896. P. filifolia Vasey, Contr. Nat. 

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

 based on P. filifolia Vasey. P. spillmani Piper, Erythea 7: 102. 1899. P. capillari folia 

 Scrilm. & Williams, U. S. Dept. Agr. Div. Agrost. Circ. 9: 1. 1899, type Hansen 2614. 



26. P. nevadensis Vasey. Tufted perennial; culms 1% to 3 feet high, 

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

 scabrous; panicle narrow, 4 to 6 inches long; spikelets 3 to 4 lines long, nar- 

 row; glumes narrow, the second I 1 /-? lines long; lemmas smooth or scaberu- 

 lous, not pilose or webbed, 1% lines long. 



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

 eastern California to Wyoming and Colorado. 



Locs. Siskiyou Co., Heller 8070; Moulton, Griffiths fy Hunter 463; Honey Lake Valley, 

 Davy 3305, 3319; Chat, Jones; Sierra Valley, Lemmon 4672, 5461; Mt. Tallac, Hitchcock 

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

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



Kef . POA NEVADENSIS Vasey ; Scribn. Bull. Torr. Club 10 : 66. 1883. 



27. P. brachyglossa Piper. Tufted perennial ; culms glabrous, l 1 /^ to 3 feet 

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

 and firm, flat or involute; panicle narrow, 4 to 8 inches long, the branches 

 asc-ending; spikelets 4 to 5 lines long; glumes smooth, 2 to 2y 2 lines long; 

 lemmas smooth or nearly so, firm. 



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

 math River, Butler 467; Lassen Co., Davy, Baker & Nutting; Mt. Lola, Kennedy 

 d- Dot en 182. 



Ref. POA BRACHYGLOSSA Piper, Proc. Biol. Soc. Wash. 18: 145. 1905. 



28. P. pringlei Scribn. Tufted perennial; culms 4 to 10 inches high, the 

 base sometimes decumbent and rhizome-like; sheaths smooth, loose and 

 papery; 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 ; lemmas 2% to 3 lines long, smooth or 

 scabrous, not webbed or pilose. 



High mountains of California. 



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

 Stanford, Soune 15; Donner Pass, Heller 7157; Butte Co., Austin 118; Mt. Goddard, Hall $ 

 Chandler 691; Mt. Tallac, Hitchcoclc 3151; Castle Peak, Leiberg 5303; Tuolumne Meadows, 

 McLean; Farewell Gap, Purpus 5207; Mt. Whitney, Coville $ Funston 2066; Mt. Pinos, Hall 

 546. 



Ref. POA PRINGLEI Seribn. Bull. Torr. Club 10: 31. 1883, type from headwaters of Sacra- 

 mento River, Pringle in 1882. 



29. P. leibergii Scribn. Tufted perennial ; culms 3 to 8 inches high ; sheaths 

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

 short : panicle narrow, 1 to 2 inches long, usually purple, the branches short, 

 approssed : spikelets 2 to 3 lines long; glumes 1% to 2 l ines long; lemmas l l /2 

 lines long, smooth or scaberulous, not webbed or pilose, the nerves obscure. 

 Differs from P. pringlei in the smaller spikelets ; from P. hanseni in the smooth 

 and firmer blades. 



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



