284 : PITTONIA. 
Dry barren ground among the Cypress Hills, North west 
Territory, John Macoun, 1883, n. 11245. Remarkably dis- 
tinct from all other known species by its rigid fruticulose 
habit, and rosulate leaves terminating the short branches, 
the whole strongly suggesting some possible silvery-leaved 
Sedum. | 
* * Tips of involucral bracts brownish or dark-brown. 
+ Leaves glabrate, at least above. 
A. ALPINA, Geertn. Fr. et Sem. ii: 410, but only as to the 
name; the description and figure appertaining to the male 
of A. dioica. ‘True A. alpina is one of the few species of its 
genus in which the pappus-bristles of the male flowers are 
only more strongly barbellate at the apex without being 
clavellate-dilated. Except under a strong lens the bristles 
are quite alike to the eye, in female and male specimens. 
This is the only species to which Linnsus gave (under 
Gnaphalium) a diagnosis, and by that diagnosis it is easy to 
identify it. It was described from Lapland specimens; is 
common in the mountains of Norway and of Greenland, but 
is not known to occur on the North American continent, 
unless perhaps a sheet of specimens (n. 11239) in Canadian 
Survey collection, said to have been obtained on the Arctic 
sea coast by Dr. Richardson, may represent it. 
A. ANGUSTATA. Low and tufted, the offsets very short and 
suberect, scarcely stolon-like, densely leafy: leaves $ inch 
long, very narrowly spatulate, acute (cuspidately mucronate 
under a lens), glabrate above: stems 14 to 3 inches high, © 
notably leafy, the leaves nearly approaching those of the 
offsets in size and form: heads large, mostly solitary and 
campauulate, rarely 2 or 3: outer bracts of the involucre 
oblong-lanceolate, the inner lanceolate, all acuminate, of à 
dark greenish brown. 
Known only from coasts of Hudson's Strait, where it was — 
