PIPER—FLORA OF THE STATE OF WASHINGTON. 593 
SPECIMENS EXAMINED: Mount Rainier, Allen 285; Piper 2139; Mount Adams, Suksdorf 
567: Henderson, August 10, 1892; Howell in 1882; Suksdorf 567; Yakima County, Hender- 
son 2298; Yakima Region, Brandegee 912; Mount Stuart, Elmer 1164, 1163; Caseade Moun- 
tains, 49°, Lyall in 1860; Skagit Pass, Lake & Hull 736; Stevens Pass, Sandberg & Leiberg 
725; Bridge Creek, Elmer. 
Most of the above specimens were distributed as A. chamissonis Less., a species which 
apparently does not reach our limits. 
14. Arnica cana Greene, Ottawa Nat. 15: 282. 1902. 
Arnica foliosa incana Gray, Bot. Cal. 1: 416. 1876. 
Arnica incana Greene, Pittonia 4: 169. 1900, not A. incana Pers. 1807. 
Tyre Locatity: Lake Tahoe, California. 
Rance: Washington to California. ; 
SPECIMENS EXAMINED: Cascade Mountains, Brandegee 139; White Salmon, Suksdorf in 
1878; Big Klickitat River, Henderson in 1892. 
15. Arnica longifolia D. C. Eaton in Wats. Bot. King. Explor. 186. 1871. 
Tyee Locauity: ‘Clover Mts.’’ Nevada. 
Rance: Washington? and Idaho to California and Utah. 
SPECIMENS EXAMINED: Klickitat County, Suksdorf 568, a somewhat doubtful specimen. 
the akenes hairy as well as glandular. 
The above treatment of the Washington species of Arnica is far from satisfactory. It 
is probable that further study in the field will compel the recognition of a larger number 
of species. Collectors should secure large series of specimens and note carefully which 
characters are constant and which are due to differences in environment. 
PETASITES. 
Alpine plant; leaves ovate or oblong, 5 to 7-lobed, 5 to 10 em. long... ...- 3. P. frigida. 
Lowland plants. 
Leaves broadly sagittate, very coarsely dentate ............2-2.-.---- 1. P. dentata. 
Leaves reniform-orbicular, 7 to 11-cleft, very large, often 30 em. or more 
broad . 2.2.0.0 0 2222 eee 2. P. speciosa. 
1. Petasites dentata Blankinship, Mont. Agr. Coll. Sci. Stud. 1:64. 1905. 
Type Locauity: “The common Rocky Mountain species.”’ 
RaNGE: British Columbia to Hudson Bay south to Colorado. 
SPECIMENS EXAMINED: Marshall Junction, Piper, July 2, 1896; Pend Oreille River, Lyall 
in 1861. 
ZONAL DISTRIBUTION: Canadian. 
This species has been generally confused with the entire leaved P. sagittata Pursh of 
the Hudson Bay region. 
2. Petasites speciosa (Nutt.) Piper, Mazama 2: 97. 1901. 
Nardosmia speciosa Nutt. Trans. Am. Phil. Soc. 7: 288. 1840. 
Type Locatity: ‘Shady forests of the Oregon and Wahlamet by streams.” Collected 
by Nuttall. 
RanGE: British Columbia to California. 
_ SPECIMENS EXAMINED: Port Ludlow, Binns; Seattle, Piper 123; Silverton, Bouck 104; 
Tacoma, Flett 201; upper Nisqually Valley, Allen 54; Larm River, Suksdorf 140; 
Wenache Mountains, Whited 1341. 
ZONAL DISTRIBUTION: Humid Transition. 
This species is entirely different from the eastern P. palmata (Ait.) Gray, with which 
authors have confused it. 
29418—O0G6 M 
38 
