STUDIES IN THE COMPOSITAE. 287 
brinella, took the present plant for the real A. alpina, or at 
least as representing, in some way, that species. It is dis- 
tinguished from A. umbrinella chiefly by its smaller size, 
more herbaceous texture, and larger heads, with narrower 
thinner darker-colored bracts. From A. alpina, on the other 
hand, it is entirely foreign in view of the distinctly dilated 
pappus-bristles of the male flowers. They are narrower, 
indeed, at the tip, than those of A. wmbrinella, yet Old 
World and genuine A. alpina never displays any kind of 
an approach to this sort of pappus; and its involucral bracts 
are also decidedly narrower and more acuminate than in 
this, its West American homologue. 
A. media is common on the eastern slope of the Sierra 
Nevada in northern and middle California, thence north- 
ward to Oregon, Washington, and British Columbia. Good 
herbarium specimens have been distributed by Mr. Sonne, 
from mountains above Coldstream, Placer Co., California, 
and from Mt. Hood, Oregon, by Mr. Howell. In the Cana- 
dian Survey collection the following sheets exemplify the 
Species: n. 11242 (in part), from crevices of rocks, alt. 6000 
ft, on mountains north of Griffin Lake, B. C.; n. 11243, 
summit of Mt. Arrowsmith, Vancouver Island, on dry 
slopes; n. 11246, on mountain slopes, Bow River Pass, B. C., 
all by John Macoun. 
A.PULVINATA. Dwarfish but rather stout, the ascending 
or decumbent notably leafy flowering stems 2 to 4 inches 
high, arising from a compact cushion-like mass of short 
rosulate-leafy offsets; the leaves of the latter mostly less 
than 4 inch long, obovate or spatulate-obovate, very white - 
on both faces with permanent tomentum: leaves of the stem 
- longer than the others, oblong or spatulate-oblong, acute : 
heads very large for the plant, usually 6 or 8 in a dense 
. glomerate cluster: bracts of the involucre rather light- 
i 
E: 
e 
i. 
brown (but darker than in A. umbrinella), of the female 
plant lanceolate, acute, of the male oval, obtuse: bristles of 
