36 PITTONIA. 
though occurring at the north as far westward as the inte- 
rior of Humboldt Co., is properly a shrub of the Sierra Ne- 
vada; is always tomentulose even to the outside of the 
calyx, and hasashorter broader flower, with quite different 
petals, these being only erose-dentate, and much thicker 
and more waxy in appearance than those of R. cruentum. 
^ Arnica MERRIAMI. Stems from ascending rootstocks, 
slender, simple, monocephalous, about a foot high: lowest 
leaves upright, oblong-lanceolate, slenderly petiolate, entire 
obscurely 3-nerved; the cauline in two pairs, lanceolate, 
sessile, entire or denticulate, all sparingly pubescent and 
somewhat glandular; the peduncle of the large head glandu- 
lar-hirsute: bracts of the campanulate involucre lanceolate- 
acuminate, purplish: rays and disk saffron-color: pappus 
pale-fuscous and subplumose; acheues sparsely hirsute, not 
glandular. 
This species is known to me only as an alpine plant of 
the Californian Sierra; and it has passed heretofore as 
A. alpina, which is European. Itis here described from speci- 
mens obtained on Mt. Shasta, 18 July, 1898, by Dr. C. Hart 
Merriam, who observes that it is an associate of Bryanthus. 
From A. fulgens, Pursh, which is its lowland homologue, 
occurring from along the eastern foothills of the ‘Sierra 
northward and eastward to and beyond the Rocky Mountain 
plains, both its leaves, flowers and pappus abundantly dis- 
tinguish it; for A. fulgens has a prominently 5-nerved foliage 
of another outline, oblong and merely acutish bracts, yellow 
flowers, and a whitish merely barbellulate pappus. 
* ARNICA RypBerGit. About a foot high, from an ascend- 
ing rootstock, simple and rather leafy up to the 2 or 3 
slender-peduncled and subcorymbose heads, apparently all 
the leaves opposite, and the lowest subradical pair very 
small, these spatulate-oblong, denticulate, those next above 
much larger, similar in outline, indistinctly 3-nerved, re- 
