PIPER FLORA OF THE STATE OF WASHINGTON. 591 



Stt'in leaves liUReolate or lanec-ol)l(tiig 11. ,1. UKicounii. 



Upper surface of leaves pubescent. 



Pubescence sparse, pilose 12. .1. asjiera. 



Pubescence dense, short 13. .1. mollis. 



Leaves subentire, rarel}^ lanceolate. 



Herbage white-tomentose 14. A. cana. 



Herbage glabrous or nearh' so 15. ^i. lomjifolid. 



1. Arnica discoidea Bentli. PI. Hartw. 319. 1849. 

 Arnica cordifolia eraJiata Gray, Syn. Fl. 1-: 381. 1884. 

 Type locality: Monterey, California. 



Range: British Columbia to California. 



Specimens examined: Falcon Valley, Sul-:iilo/f IVA7 , 565. 



2. Arnica cordifolia Hook. FL Bor. Am. 1: 331. 1833. 

 Arnica macrophylla Nutt. Trans. Am. Pliil. Soc. 7: 407. 1841. 



Type locality ; "Alpine woods of the Rocky Mountains on the east side. " Collected by 

 Drunimond. 



Range: British Columbia to California and Colorado. 



Specimens examined: Upper Nisqually Valley, Allen 139; Mount Adams, Flett 1103; 

 Clealum, Whited 621; near Wenache, W'/ii?e(? 91, 1101; Eiiion, Henderson, imw 11, 1892; 

 Spokane, Pipe/", May 16, 189G; Hangman Qvci'k, Sandherg & Leiherg 42; Kamiak Butte, 

 Moore, June 4, 1893; Pi per,. Ju]y 20, 1899; witliout locality, Vaseij 535; Lake Kalispel, 

 Kreager 351 . 



Zonal distribution: Arid Transition and Canadian. 



3. Arnica graciHs Rydberg, Bull. Torr. Club 24: 297. 1897. 

 Arnica midliflnra Greene, Pittonia 4: 162. 1900. 



Type locality: Spanish Peaks, Montana. 



Range: Washington to Montana. 



Specimens examined: Baldy Peak, Lamb 1306; Mount Steele, Piper 2203; Looniis, 

 Elmer, August, 1879; Nason Creek, Sandberg tf- Lnbcrg 6S2; Mount Adams, Suksdoif, Sep- 

 tember 17, 1883. 



4. Arnica latifolia Bong. Mem. Acad. St. Pctersb. \l 2: 147. 1832. 

 Arnica ntenzicsii Hook. Fl. Bor. Am. 1: 331. 1833. 



Type locality: Sitka. 



Range: Alaska to Oregon and Colorado. 



Specimens examined: Olympic Mountains, Pipw 2205, 1072, Cascade Mountains, 49°, 

 Lyall; Mount Rainier, Piper 2143 and August, 1895; Fleit 247: Mount Stuart, Elmer 

 1165; Mount Adams, Henderson, August 10, 1892; Sulsdoif 195, Flett 1080, upper Nis- 

 qually Valley, ^IZ/e/i, 138; Silverton, Bouck 106; Yakima Region, Pmnr/cyte 913, Skagit 

 Pass, Lake & Hull 737; Stevens Pass, Whited 1462. 



Zonal distribution; Hudsonian. 



5. Arnica betonicaefolia Greene, Pittonia 4: 1()3 19(X). 



Type locality. "At 6000 to 7000 feet on slopes of Movuu Steele of (lie ()lynii)ic 

 Mountains. " 



Range. Olympic Moimtains, Washington. 



Specimens examined: Baldy Peak, Land) 13(M'), Mount Steele, Piper 2202, Mount 

 Storm King, Lawrence 349. 



Zonal distribution. Arctic. 



This species is closely allied to A. latifoha Bong., and may prove to Ix' nnihing but a 

 reduced alpine form of it 



6 Arnica parryi A Gra> Am. Nat. 8; 213. 1874. 

 Type locality. Colorado. Collected by Parry. 



