360 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Specimens examined: Wcnachc Mountains, H'^iVfc/ 1355, 11: North Yakima. Mrs.Steinuig 

 in 1894; Klickitat County, HoxreU 126; Cleman Mountain, Henderson in 1892; near Mount 

 Adams, Flett 1259; "Ketetas" Valley, Lyall in 1860: Blue Mountains near source of Walla 

 Walla River, Douglas in 1826: without locality, Vasey in 1889; Klickitat Hills, Gorman, 

 April, 1895; Kittitas County, Cotton 1606. 



Zonal DisTuiBrTiox: Upper Sonoran. 



2. Trifolium douglasii House, Bot. Gaz. 41: 335. 1906. 



Trifolium altissimum Dougl.; Hook. Fl. Bor. Am. 1 : 130. 1830, not Loisel. Fl. Gall. 2: 479, 

 1807. 



Type ix)cauty: "Between the Spokane River and Kettle Falls of the Columbia." Col- 

 lected by Douglas. 



Ran<;e: North Idaho and adjacent Washington and Oregon. 



Specimens examined: "'E' of W. Walla," -Vu«a//; Spokane County, Swi-srfor/"; Spokane, 

 Henderson, June, 1892; Pullman, Piper 1485; Hull 436; without locality, Geyer 472. 



Zonal dlstribution: Arid Transition. 



3. Trifolium plumosum Dougl.; Hook. Fl. Bor. Am. 1: 130. 1830. 



Type ixxjauty: "Blue Mts. in North-West America in alluvial soils." Collected by 

 Douglas. 



Ranoe: Western Idaho, northeastern Oregon, and doubtfully southeastern Washington. 

 Specimens examined: Columbia River, Douglas in 1830 (a Washington locality ?). 

 Zonal distribution: Canadian. 



4. Trifolium eriocephalum Nutt.; Torr. & Gr. Fl. 1: 313. 1838. 



Type lchality: "Prairies of the Wahlamet and near Fort Vancouver." Collected by 

 Nuttall. 



Range: Wa.sliington to California in the coast region. 

 Specimens examined: Fort Vancouver, Nuttall. 

 Zonal distribution: Humid Transition. 



6. Trifolium arcuatum Piper, Bull. Torr. Club 28: 39. 1901. 

 Type locality: Simcoe Mountains, Washington. Collected by Suksdorf. 

 Range: Washington and Oregon east of the Cascade Mountains. 

 Specimens examined: Simcoe Mountains, Suksdorf 270. 

 Zonal distribution: Arid Transition. 



6. Trifolium latifobum (Hook.) Greene, Pittonia 3: 223. 1897. 

 Trifolium longipes lalifolium Hook. Lond. Journ. Eot. 6: 209. 1847. 



Type locality: "Open pine woods on the undulating ridges of the Coeur d'Alene 

 Mountains, near St. Josephs," Idaho. Collected by Geyer. 



Range: Washington, Idaho, and Oregon. 



Specimens examined: Upper Naches River, Henderson, June, 1892; Mount Adams, 

 Henderson, August, 1892; Lake Kcechelus, Henderson, July, 1892; Clealum, Henden^an, 

 June, 1892; Wenache Mountains, Elmer 437; Peshastin, Sandberg cfe Leiberg 527; Spokane 

 County, Suksdorf 919, 918; Spokane Valley, Lyall in 1861. 



Zonal distribution: Canadian. 



7. TrifoUum longipes Nutt.; Torr. & Gr. Fl. 1: 314. 1838. 

 Trifolium caurinum Piper, Erythea 6: 29. 1898. 



Type locality: "Valleys of the central chain of the Rocky Mountains and on the moist 

 plains of the Oregon as low as the Wahlamet." Collected by Nuttall. 



Range: Washington and Idaho to California and Arizona. 



Specimens examined: Big Creek Prairie, LamJ; Clallam County, £'Zmer 2538; Klickitat 

 County, Suksdorf in 1878; Skamania County, Suksdorf 2577; Klickitat River, Flett 1263; 



