_ AND GENERA OF 407 
ARNICA. (Linn.) 
Arnica angustifolia, Vaut. A. fulgens, Pursu, Flor. Bor. Am., Vol. IL., 
p. 527. ; 
Has. On the plains of the Platte to the Rocky Mountains. Labrador, (Schweinitz!) from which 
locality it appears to be the .2. plantaginea of Pursh. 
Arma * lanceolata; stem leaves about three pairs, semiamplexicaule, lanceo- 
late or oblong-lanceolate, three-nerved, acute, irregularly dentate-serrate, nearly 
smooth, with the margin and stem pubescent; capituli about three, pedunculate ; 
involucrum longer than the disk; sepals about twelve to fifteen, lanceolate, acu- 
minate, hirsute and glandular, as well as the Pace achenium also hirsute ; 
pappus nearly plumose. 
Has. On the White Mountains of New Hampshire, at the i = of four thousand five hundred 
feet, (according to the observation of my friend Charles Pickering.) A very distinct species, allied, 
apparently, to 2. Chamissonis. About a foot high, leaves two to three inches long, one to one 
and a half wide, of a thin consistence, and nearly as large at the summit as at the base of the stem; 
the lowest leaves somewhat cuneate, sessile. Stigmas much exserted, clavately thickened at the 
summit, and pubescent below the point; those of the ray long and filiform, much exserted: the ray 
without Sa rudiments of stamina, two and three-toothed at the extremity. 
Arnica * fohosa; pubescent and minutely glandular; stem leaves three ‘to 
five pairs, lanceolate or oblong-lanceolate, subacute, the radical and lower mostly 
long petiolate or attenuate, often subserrate; capituli three to five, long pedun- 
culate; involucrum about the length of the disk, the segments linear-lanceolate, 
subacute and pilose at the tips; rays scarcely longer than the involucrum, with- 
out abortive filaments; achenium pubescent. 
Has. On the alluvial flats of the Colorado of the West, particularly near Bear River, of the lake 
Timpanagos. A species of somewhat variable aspect, allied to A. angustifolia, but very distinct; 
the rays much shorter, narrower, and sulphur yellow. In the slender form the stem is about a 
foot high, with the radical leaves narrow lanceolate, mostly entire, and attenuated into a long 
petiole, the two or three upper pairs sessile and semiamplexicaule. In another variety, which I 
call s. * andina, the radical leaves are ovate-lanceolate, and usually subserrate, with a shorter stem, 
and more numerous flowers; sepals somewhat biserial, about fifteen or sixteen, more or less hirsute, 
not acuminate; point of the stigma thickened, with a sorpem bat conie point. This variety appears 
to be allied to 4. Chamissonis, but the achenium is less hi 
sepals rather obtuse than acuminate, é&c, 
Arnica Menziesit, Hoox. Flor. Bor. Am., t. 111. 
Has. In the Rocky Mountains, in the central chain, where it is sometimes diminished in es 
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te than in 4. montana, and the 
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wes 
