360 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
SPECIMENS EXAMINED: Wenache Mountains, Whited 1355, 11; North Yakima, Mrs. Steinweg 
in 1894; Klickitat County, Howell 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 DISTRIBUTION: 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 Loca.ity: ‘“ Between the Spokane River and Kettle Falls of the Columbia.’ Col- 
lected by Douglas. 
Rance: North Idaho and adjacent Washington and Oregon. 
SPECIMENS EXAMINED: “Et of W. Walla,’ Nuttall; Spokane County, Suksdorf ; Spokane, 
Henderson, June, 1892; Pullman, Piper 1485; Hull 436; without locality, Geyer 472. 
ZONAL DISTRIBUTION: Arid Transition. 
3. Trifolium plumosum Dougl.; Hook. Fl. Bor. Am. 1: 130. 1880. 
Type Locatity: “Blue Mts. in North-West America in alluvial soils.’ Collected by 
Douglas. 
Rance: 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. 
Tyre Locaity: ‘Prairies of the Wahlamet and near Fort Vancouver.’ 
Nuttall. 
Range: Washington to California in the coast region. 
SPECIMENS EXAMINED: Fort Vancouver, Nuttall. 
ZONAL DISTRIBUTION: Humid Transition. 
, 
Collected by 
5. Trifolium arcuatum Piper, Bull. Torr. Club 28: 39. 1901. 
TYPE LocALITy: Simcoe Mountains, Washington. Collected by Suksdorf. 
Rance: Washington and Oregon east of the Cascade Mountains. 
SPECIMENS EXAMINED: Simcoe Mountains, Suksdorf 270. 
ZONAL DISTRIBUTION: Arid Transition. 
6. Trifolium latifolium (Hook.) Greene, Pittonia 3: 223. 1897. 
Trifolium longipes latifolium Hook. Lond. Journ. Bot. 6: 209, 1847. 
Type LocaLiry: “Open pine woods on the undulating ridges of the Coeur d’Alene 
Mountains, near St. Josephs,’’ Idaho. Collected by Geyer. 
Rance: Washington, Idaho, and Oregon. 
_ SPECIMENS EXAMINED: Upper Naches River, Henderson, June, 1892; Mount Adams, 
Henderson, August, 1892; Lake Keechelus, Henderson, July, 1892; Clealum, Henderson, 
June, 1892; Wenache Mountains, Elmer 437; Peshastin, Sandberg & Leiberg 527; Spokane 
County, Suksdorf 919, 918; Spokane Valley, Lyall in 1861. 
ZONAL DISTRIBUTION: Canadian. 
7. Trifolium longipes Nutt.; Torr. & Gr. Fl. 1: 314. 1838. 
Trifolium caurinum Piper, Erythea 6: 29. 1898. 
Type Loca.ity: “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. 
RanGeE: Washington and Idaho to California and Arizona. 
SPECIMENS EXAMINED: Big Creek Prairie, Lamb; Clallam County, Elmer 2538; Klickitat 
County, Suksdorf in 1878; Skamania County, Suksdorf 2577; Klickitat River, Flett 1263; 
