me:moirs of the XE^v york botanical garden. 433 



Arnica latifolia Bong. Veg. Sitch. 147 [83^1. Fl. i- : 381 ; Man. R. 



M. 205 ; Bot. Cal. i : 415]. 



In the woods, at an altitude of 2000-2500 m. It is veiy variable 

 or may contain several distinct species. 



Montana: Park Co., 1887, Tzveedy, 322; Tiger Butte, 1888, /P. 

 S. Williams, 443: Spanish Peaks, 1896, Flodman, 8g8 ; Bozeman, 

 1895, Rydberg, 2^46; Bridger Mountains, June 15, 1897, Rydbcrg 

 & Bessey, 3228 (a single small specimen) ; Pony, July 7, 3230; Mc- 

 Donald's Peak, 1883, Canby, igg. 



Yellowstone Park: 1885, Tzceedy, 687; Shoshone Lake, 

 Aug. 10, 1897, Rydberg (& Bessey, 3227. 



Arnica cordifolia Hook. FI. Bor. Km. i: 331 [Syn. Fl. i^' : 381; 



Man. R. M. 205; 111. Fl. 3: 471; Bot. Cal. i: 415]. 



A very common plant throughout tlie woody regions of Montana 

 and the Park, from 1033-3033 m. altitude. 



Montana: Deer Lodge, 1888,/^. W. Traphagcn ; Yellowstone 

 Co., 1886, Tivecdy, 1134; Upper Sand Coulee, 1888, R. S. Wil- 

 lianis, 23; Columbia Falls, 3frs. Kennedy, 8; Gallatin Co., 3frs. 

 Alderson ; Bridger Mountains, 1896, Flodinan, 8g6\ Little Belt 

 Mountains, 8g'j ; Bozeman, 1895, Rydberg, 2843; Jack Creek, 

 July 14, 1897, Rydbcrg & Bessey, 3233; Spanish Basin, June 28, 

 3234; Bridger Mountain, June 17, 3233; Pony, July 9, 3236: Jef- 

 ferson River, 1883, Scribncr, 124a. 



Yellowstone Park : 1888, Dr. Chas. H. Hall; Mammoth 

 Hot Springs, 1885, Tzvecdy, 686: 1884, 180. 



* Arnica pumila. 



Stem low, generally 1-2 dm., seldom 3 dm., high, more or less 

 hirsute, and the upper portion somewhat woolly and glandular ; 

 leaves comparatively firm, ovate, the basal ones petioled ; stem-leaves 

 1-2 pairs, very short-petioled or sessile, all puberulent ; head tur- 

 binate, about 2 cm. high ; bracts oblong-lanceolate, acute, puberu- 

 lent and slightly villous at the base ; achenes slightly tapering 

 upward, puberulent. 



Nearest related to A. cordifolia, but is a smaller plant with smaller 

 heads, and smaller and thicker leaves, which are not cordate at the 

 base. 



Montana: Silver Bow Co., Mrs. Jennie H. Moore; Bozeman, 

 1892, W. T. Shaiv ; Bear Gulch, 1887, Txveedy, 324. 



Utah: 1875, ^'- ^- Parry, 3g. 



Colorado: 1872, y. Zbrrt-j' (type). 



