A FASCICLE OF NEW ARNICAS. 169 
British American Rocky Mountains, near the Athabasca 
River, 30 June, 1898, collected by Mr. W. Spreadborough, 
and communicated under the above appropriate name, by 
Mr. Macoun. It is not easy to suggest any near affinity for 
a species so strongly marked, especially in the peculiar in- 
dument of its achenes. 
A. INCANA. A. foliosa, var. incana, Gray, in part only. 
Much stouter than the last, with a considerable tuft of long 
erect basal leaves, the three more distinctly cauline pairs 
much reduced and all shorter than the internodes, the whole 
herbage whitish with a dense floccose tomentum: leaves all 
lanceolate, only the very lowest denticulate, the rest entire: 
heads twice as large as in the last, the numerous lanceolate 
biserial bracts less woolly than other parts: rays loosely 
villous externally: disk-¢orollas with long hirsute tube and 
narrow glabrous throat, the teeth sometimes bristly at tip: 
achenes short-setulose and minutely glandular; pappus 
subfuscous, subplumose. 
Dr. Gray, in defining this as a variety of A. foliosa made 
mention of only one of its several good distinguishing char- 
acteristics. Quite as remarkable as its pubescence, is the 
peculiarity of its large tuft of enduring basal leaves and the 
few and reduced cauline ones, these features investing the 
plant with an aspect most unlike that of A. foliosa; and 
again, this stout stem and large bunch of leaves are sup- 
ported by a strong tuft of long coarse roots, nothing like 
which is seen in A. foliosa, where the slight and slightly 
leafy stems seem to require no support other than that of 
the roots scattered along the length of the rhizome. 
The best type of A. incana occurs in the high mountains 
of middle California, about Lake Tahoe. Other plants, 
intermediate between the two, occur further northward in 
same range, and were referred by Gray to this variety. No 
