288 PITTONIA. 
the pappus in the male not in the least clavellate at tip, 
though somewhat thicker and more barbeliate above the 
middle. 
À remarkably distinct species by its vegetative characters, 
the cæspitose portion, with its broad rounded white-woolly 
closely compacted leaves, resembling some pulvinate-czespi- 
tosen Hriogonum ; but in floral character the plant is more 
nearly allied to A. alpina than are some which bear a greater 
superficial resemblance to it. A. pulvinata is known only 
in the Canadian Survey collection, from the far Northwest, 
where it has been several times obtained by. Mr. John Ma- 
coun, whose specimens bear the following numbers: 18491, 
18493, 18495 and 18498, all from Alberta; and from Kick- 
ing Horse Lake, 1890, by the same. 
A. EXILIs. Smallest of species and strictly monocepha- 
lous ; stems of male plant 3 to 1 inch high, of female 2 or 3 
inches, all very slender; stolons equally so, and none much 
exceeding $ inch in length, moderately leafy, the leaves spat- 
ulate, acute, of thinnish texture and permanently white- 
woolly on both faces: involucres campanulate, the thin 
brown scarious tips of the bracts ovate-lanceolate or lanceo- 
late and acute or acuminate in the female, much darker and 
from round-obovate, and very obtuse, to ovate and acutish 
in the male: pappus-bristles in the male very distinctly cla- 
vellate-dilated at summit, and the dilated portion not serru- 
late, but almost entire. 
Known only from St. Paul Island, Behring Sea, where it 
was collected in 1887, the male plants by Mr. James Macoun, 
2 July, the female by Mr. Trevor Kincaid, 15 August. 
Thoroughly distinct from A. monocephala not only by the 
permanency of the white indument, but in the character of 
the indument itself, this being very fine, close, and silky 1n 
the older species, and loose and woolly in the new one. 
A. LANATA. A. carpathica, var. lanata, Hook. Fl. i 329. 
I am still without evidence that true A. carpathica exists 11 
