286 PITTONIA. 
named that Gertner mistook the male A. dioica for Linneus’ 
Gnaphalium alpinum. I have seen no male individuals of 
A. monocephala. 
Mr. James M. Macoun collected the species at its original 
station, Unalaska Island, in 1891; and it is not yet known 
from any other locality. 
+— + Leaves permanently woolly on both faces. 
A. UMBRINELLA, Rydb. When the author of this excel- 
lent specific proposition compares the species with A. alpina, 
he says that “the staminate plants of the two are almost 
identical in every respect, except that the bracts are of 
slightly lighter color in A. umbrinella.” I cannot but infer 
from this that Mr. Rydberg had failed to settle for himself 
the identity of A. alpina. The two differ very widely as to 
certain vegetative characters; A. umbrinella exhibiting 
slender dry and wiry stolons, and wearing the whole aspect 
of those plants which have an arid habitat. Its foliage is 
much broader in proportion to its length, and is densely 
and permanently tomertose on both faces; and the pappus 
in the male is as strongly clavellate here as in A. dioica 
itself. 
The Rocky Mountains of Wyoming and Montana seem 
to be the center of distribution for the species. I find little 
of it in the collection of the Canadian Survey. Two speci- 
mens (on sheet 11242), both male, from Spence’s Bridge, 
B. C., I refer here, although they have a looser inflorescence 
than is seen in any more southeasterly specimens ; also sheet 
11267, from dry mountain pastures, Kicking Horse Lake, 
B. C., seems to be a larger looser form of the same, the speci- 
mens female. 
A. MkDIA. I am constrained to thus designate as a sub- 
species or species all that has passed for Pacific N. American 
A. alpina. Doubtless Mr. Rydberg, in segregating A. um- 
