RYDBERG: NOTES ON ROSACEAE 353 
mens in the herbarium of the New England Botanical Club, 
although I saw all in the Gray Herbarium. I have never seen 
any one, however, with such broad rounded petals as are usual 
in A. occidentalis. The latter has usually also broader and more 
obovate leaflets. Evenif A. occidentalis and A. litoralis should be 
one species or variety, as you please, and the characters assigned 
should be found inconstant, the name of the eastern plant should 
not be Potentilla pacifica Howell, for that species was based on 
P. Anserina B grandis T. & G. The type was collected by 
Scouler and a fair duplicate is in the Torrey Herbarium. If I 
have not known the eastern plant ‘‘in its full beauty,” I doubt if 
Professor Fernald has seen Potentilla pacificainits. Atleast he did 
not see it in the Gray Herbarium, for if I remember rightly there 
was but one fair specimen of it there, shortly before my manuscript 
-went to press. 
The first synonym given under Potentilla pacifica by Professor 
Fernald is P. Anserina groenlandica Tratt. The type of the 
latter, collected by Giesecke, I have not seen, but Trattinick’s 
description points evidently to the form of P. Egedii Wormskj. 
with the leaves whitened beneath. Notwithstanding the fact that 
Dr. Wolf limits P. Anserina Egedii to the glabrous form the fact 
remains that in Argentina Egediit (Wormskj.) Rydb. the leaves 
are whitened beneath or not, even in the same plant. Evidently 
Dr. Wolf includes in his var. groenlandica also the arctic plant 
from Alaska, which I described as A. subarctica. This Professor 
Fernald reduced to a synonym of Potentilla pacifica. Placing 
the duplicate of the types of Argentina pacifica, collected by Scouler, 
and the type sheet of A. subarctica collected by Dr. A. Hollick side 
by side, few persons would regard them as the same species or 
at least not as the same variety. P. subarctica is characterized 
by its decidedly turbinate hypanthium and few achenes, char- 
acters found only in this species and Argentina Babcockiana. 
In all the others the hypanthium is almost flat. The petals are 
rarely over 8 mm. long, while in A. pacifica they are usually 12-15 
mm. long. In the latter the leaves are almost erect while in the 
other species they are spreading, except when growing among tall 
grass. 
Dr. Wolf’s treatment in including all the forms belonging to 
