360 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Specimens examined: Wenache Mountains, TFAiffrf 1355, II : North Yakima, Mrs. Sfehnccr/ 

 in 1894; Klickitat County, Howell 126; Clenian Mountain, Henderson in 1892; near Mount 

 Kd&mSjFlett 1259; "Ketetas" Valley, Lyall in 1860; Blue ilountains near source of Walla 

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

 April, 1895; Kittitas County, Colton 1606. 



Zonal distribution: Upper Sonoran. 



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



Trifollnin altlss'iiitinn\)ow^\.: Hook. Fl. Bor. Am. 1 : 130. 1830, not Loisel. Fl. Gall. 2: 479, 

 1807. 



Type locality: "Between the Spokane River and Kettle Falls of the Columbia." Col- 

 lected by Douglas. 



Range: North Idaho and adjacent Washington and Oregon. 



Specimens examined: "E* of W.Walla," iVw/ZoZZ; Spokane County, iS't/Z^Wo?/; Spokane, 

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



Zonal distribl'tion: Arid Transition. 



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



Type locality: "Blue Mts. in Nortli-Wcst America in alluvial soils." Collected by 

 Douglas. 



Ran(;e: 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. ^c Gr. Fl. 1: 313. 1838. 



Type l()( alijy; "Prairies of the Wahlamet and near Fort Vancouver." Collected by 

 Nuttall. 



Range: Washington to California in the coast region. 

 Specimens examined: Fort Vancouver, Nuttall. 

 Zonal di.stribution: Humid Transition. 



5. 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. TrifoHum latifolium (Hook.) Greene, Pittonia 3: 223. 1897. 

 Trifolium lonyipes latifolium 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 Keechelus, Henderson, July, 1892; Clealum, Hendenon, 

 June, 1892; Wenache Mountains, Elmer 437; Peshastin, Sandherg d: Leiherg 527; Spokane 

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



Zonal distribution: Canadian. 



7. Trifolium longipes Nutt.; Torr. & Gr. Fl. 1: 314. 1S38. 

 Tnjoliuin caurinurn Piper, Ervthea 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. 



RANtiE; Washington and Idaho to California and Arizona. 



Specimens examined: Big Creek Prairie, Zr/w/*; Clallam County, A'Zmfr 2538; Klickitat 

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



