PIPER FLORA OF THE STATE OF WASHINGTON. 133 



Specimens examined: Sunnyside, Cotton 381; Douglas County, SpiUman, May, 1896; 

 Scott, Leckenhij; near Eltopia, Cotton 1019. 

 Zonal distribution: Upper Sonoran. 



18. Poa ampla Merrill, Rhodora 4: 14.5. 1902. 

 Poa laeviculmis Williams, Bot. Gaz. 36: 55. 1903. 



Type locality: Steptoe, Washington. Collected by G. R. Vasey. 



Range: British Columbia to Idaho and Oregon. 



Specimens examined: Sprague, Henderson 2224; Sandbenj d; Leiherg, June, 1893; 

 Wawawai, LecJcenhy 3000: Piper 2567; Spokane, Piper, May, 1897; near North Yakima, 

 Henderson, May, 1892; Falcon Valley, Sulcsdorf 1127; Douglas County, SpiUman, May, 

 1896; Pullman, Piper 1755; Elmer 173. 



Zonal distribution: Arid Transition. 



19. Poa brachyglossa Piper, Proc. Biol. Soc. Wash. 18: 145. 1905. 



Type locality: Douglas County, Washington. Collected by vSandberg & Leiberg. 



Range: Washington to Nevada and California. 



Specimens examined: Wenas, Griffiths c& Cotton 80; Prosser, Griffiths <& Cotton 1; 

 Steamboat Rock, Griffi,ths & Cotton 432; Ephrata, Griffiths c£* Cotton 484; Brewster, Grif- 

 fiths & Cotton 260, 264; Condons Ferry, Griffiths cfc Cotton 421; Grand Coulee, Griffiths c& 

 Cotton 449; Coulee City, Piper 3916, 3917, 3918; Cold Creek, Cotton 402; Colville Reserva- 

 tion, Gi'iffiths cfc Cotton 401, 374, 396 ; Cow Creek, Griffiths cfc Cotton 512, 536, 518, .548; Wawa- 

 wai, Piper 3955, 4127. 



Zonal distribution: Arid Transition and Upper Sonoran. 



20. Poa nevadensis Vasey, Bull. Torr. Club 11: 66. 1883. 

 Type locality: Arizona, according to the type specimen. 

 Range: Washington to Arizona. 



Specimens examined: B'mgon, Suksdorf'IS'Sl. 

 Zonal distribution; Upper Sonoran. 



21. Poa sandbergii Vasey, Contr. Nat. Herb. 1: 276. 1893. 



Aira hrevifolia Pursh, Fl. 1: 76. 1814, not Poa hrerifolia Gaud. 1808. 



Poa incurva Scribn. & Williams, U. S. Dept. Agr. Div. Agrost. Circ. 9: 6. 1899. 



Type locality: Lewiston, Idaho. 



Range: British Columbia to Oregon and Idaho. 



Specimens examined: Wenache Mountains, Griffiths cfc Cotton 115; Wenas, Griffiths cfc 

 Cotton 66, 99; Chelan, Griffiths & Cotton 170, 173; Stehekin, Griffiths cfc Cotton 208; Con- 

 conully, Griffiths cfc Cotton 305; Olympic Mountains, Elmer 1929; Washtucna, Cotton 979; 

 Waitsburg, Horner 501; Steptoe, Vasey 8, 13, 7, 11, 14, 67; Rock Creek, Coi'ton 953; Saint 

 Johns, Cotton 963; Olympic Mountains, Piper 1989. 



Zonal distribution: Mainly Arid Transition. 



All of the Wa.shington specimens that have been called Poa tenuifolia Nutt. or Poa 

 iucJcleyana Nash are referable to P. sandhergii. 



22. Poa paddensis Williams, U. S. Dept. Agr. Div. Agrost. Bull. 17 rev. ed.: 261. 1901. 

 Poa purpurascens Vasey, Bot. Gaz. 6: 297. 1881, not Spreng. 1819. 



Type locality: "On Mt. Hood, Oregon." Collected by Iloweil . 



Range: British Columbia to Oregon. 



Specimens examined: Olympic Mountains, Piper 1915; Flett 831; Elmer 1925, 1927, 

 1930; Bridge Creek, Elmer 675; Mount Rainier, Allen 184; Piper 1967; Atanum River, 

 Henderson 2244; Mount Adams, Hoinell 83; Sulcsdorf 1.58, 159. 



Zonal distribution: Arctic. 



23. Poa curtifolia Scribn. U. S. Dept. Agr. Div. Agrost. Circ. 16: 3. 1899. 

 Type locality: Mount Stuart, Washington. Collected by Elmer. 



Specimens examined: Mount Stuart, Elmer 1148; Yakima Region, Tweedy in 1882. 

 Zonal distribution : Arctic. 



