200 BOTANICAL GAZETTE [SEPTEMBER 
ovate to oblong, 5—15°™ long: heads 1-3, mostly single and then 
long-peduncled; if more, then from the axils of the uppermost 
leaves which are often much reduced, occasionally only one of 
the leaves and lateral peduncles developing; lateral peduncles — 
equaling or even exceeding the terminal, 1%™ (more or less) in 
length: heads large (if more than one somewhat reduced), 
disk 15—20™™ high, 20-30™™ broad ; rays about twelve, 20-30 
long, 6-8™" broad; involucral bracts 14—20, lanceolate, acute, 
shorter than the disk: akenes striate, nearly linear, but tapering 
to the base, obscurely short-hispid on the angles, about 5™™ long, 
equaling the sordid, sub-plumose pappus. 
I have described this in detail, for I believe that it will ultimately be 
shown that this is a good species rather than a variety. The A. Chamissonis 
Less., from Unalashka, seems to be a much more pubescent plant, with nat- 
rower leaves and more pubescent akenes, the internodes, as compared with 
the leaves, relatively shorter, ” 
The following numbers represent some of the collections of this species 
in Wyoming : 1702, 1785, 3571, and 6379, the last from Yellowstone park, 
August 1899. M. E. Jones no, 5883, from Utah, is this species. 
Arnica Columbiana.— Perennial, 4-8 high: stems rather 
stout, erect, striate, simple below, paniculately corymbose above, 
with some lanate white pubescence: root-leaves not know! 
stem leaves several (six or more pairs not counting the 
rameal), the lower apparently petioled, the middle and upp 
ample, sessile, clasping, entire, rather conspicuously nerveds 
oblong, sub-acute, finely pubescent below, obscurely s0 above, 
8-14" long, 3-52 broad; rameal leaves and bracts ovate, the 
smaller ones acuminate: inflorescence an ample panicled 
cymose corymb of 15-30 or more rather unequal heads: 1nV0 
pan 
lucral bracts 29 (more or less), oblong, sub-acute, oe 
the disk: rays 12 or | nase -4™ broads 
( y r less, 10-14™™ long, 3-4 der bas F 
small, 5-nerved, linear-subcylindric, tapering toa slen 
only about 3m long, shorter than the sordid pappus- 
Of this unusually distinct species I have seen but two specimens, 
which are in the herbarium of the Montana State College. 
The type is Mrs, J. J. Kennedy’s no. 24, Columbia falls, 
Mes Williams’ no, 1049, from the same locality, June 14 1894» 
Mont., 1894 
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