592 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
Range: Washington and Oregon to Colorado. 
SPECIMENS EXAMINED: Olympic Mountains, Flett 130; Mount Rainier, Piper 2159; Goat 
Mountain, Allen 137; Mount Adams, Suksdorf 566; Howell; Loomis, Elmer 582; without 
locality, Vasey 536; Wenache Mountains, Cotton 1653. 
ZONAL DISTRIBUTION: Hudsonian. 
7. Arnica pedunculata Rydberg, Bull. Torr. Club 24: 297. 1897. 
Arnica monocephala Rydberg, Mem. N. Y. Bot. Gard. 1: 435. 1900. 
Type Loca.iry: Spanish Basin, Montana. 
Ranoce: Washington to Montana.. 
SPECIMENS EXAMINED: Mountains north of Ellensburg, Whited 719; Wenache Moun- 
tains, Whited 1137; Spangle, Piper, May 24, 1901; Rock Lake, Sandberg & Leiberg 1038; 
Pullman, Piper 1578; Elmer 875; Spokane, Dewart. 
This species is in habit just like the plant referred to A. fulgens Pursh, but that has 
horizontal rootstocks, while this has a cormose base covered with pale reddish tomentum. 
This difference may not prove constant, and needs further examination in the field. Both 
the species here mentioned have been referred to A. alpina Olin, which, in its typical form at 
least, does not occur in Washington. 
8. Arnica fulgens Pursh, Fl. 2: 527. 1814. 
Type Locauity: ‘On the banks of the Missouri.” 
Rance: British Columbia to Montana and Oregon. 
SPECIMENS EXAMINED: Republic, Bealfie & Chapman 264, Goat Mountains, Allen 229; 
Cascade Mountains to Colville, Lyall in 1860; Wenas and Umtanum creeks, Cotton 1148; 
Ellensburg, Piper 2677; Whited 542, 649; Spokane, Piper, July 2, 1896; Sprague, Hender- 
son 2279; Waitsburg, Horner 598; Pullman, Prper, June 13, 1894. 
ZONAL DISTRIBUTION. Arid Transition. 
9. Arnica aurantiaca Greene, Torreya 1: 42. 1901. 
Type LocaLity, “At the head of Keystone Creek, Wallowa Mountains, Oregon, at 
about 7,000 feet.” Collected by Cusick, August, 1900 
SPECIMENS EXAMINED: Goat Mountains, Allen 229 
10. Arnica amplexicaulis Nutt. Trans. Am. Phil. Soc. 7: 408. 1841. 
Arnica amplexifolius Rydberg, Mem. N. Y. Bot Gard. 1: 434. 1900 (February 15). 
Type Locautry: “On the rocks of the Wahlamet at the Falls,’ Oregon. 
Rance: Washington and Oregon. 
SPECIMENS EXAMINED: Cape Horn, Piper 4962, 5009; Olympic Mountains, Piper 2204; 
Flett 818, Mount Rainier, Allen 285a; Skagit Pass, Lake & Hull 738. 
11. Arnica macounii Greene, Pittonia 4: 160. 1900 (December 8). 
Type Loca.iry: “Near Comox, Vancouver Island.”’ 
SPECIMENS EXAMINED: Skokomish River, Piper 1074; Coast Mountains, Cooper; Cas- 
cade Mountains, 49°, Lyall in 1859; White Salmon, Suksdorf 28; Lake Cushman, Kincaid, 
June 15, 1892; Olympic Mountains, Piper, August, 1895; Mount Stuart, Elmer 1194; 
Bridge Creek, Elmer 672; Lake Wenache, Sandberg & Leiberg 633. 
This species differs from A. amplericaulis only in its narrow leaves, a character far from 
constant. 
12. Arnica aspera Greene, Ottawa Nat. 15: 281. 1902. 
Type Locatiry: Mount Ruinier. Collected by Greene. 
SpRcIMENS EXAMINED: Mount Rainier, Greene, August 20, 1889. 
This species is closely allied to the Alaskan A. chamissonis Less., but the pubescence is 
much harsher. 
13. Arnica mollis Hook. FI. Bor. Am. 1: 231. 1839. 
Type tocauity: “Alpine rivulets of the Rocky Mountains.” 
Rance: British Columbia to Quebec, south California, and Colorado. 
