88 RYDBERG: NOTES ON ROSACEAE 
briefly described. The other is usually, but not always, a larger 
plant, with the terminal leaflet decidedly petioled, the: leaves 
dark green above, white-tomentose beneath, with oblong or lance- 
olate divisions and larger petals usually decidedly emarginate. 
I take it as the same as Lange’s P. pulchella elatior, but as the name 
elatior is not available as a specific name I proposed the name 
Potentilla subarctica. ; 
Dr. Wolf does not admit P. multifida to North America, al- 
though I included it in my monograph, We have, however, 
specimens from this continent, which I can not separate from Old 
World material. Among others may be mentioned the following 
specimens: 
CANADA: Raft River, west coast of Hudson Bay, August 9, 
1904, Spreadborough 62383; Pipestone Creek, Rocky Mountain 
Park, July 7, 1904, Macoun 65150. 
Robinson and Fernald, in Gray’s New Manual, reduced Poten- 
tilla litoralis Rydb. to a synonym of P. pennsylvanica L. Their 
idea of the latter was evidently based on that of Watson, for their 
description is copied verbatim from that in the sixth edition of 
Gray’s Manual, except that the height of the plant is given in 
decimeters instead of feet. It is natural to suppose that a plant 
named P. pennsylvanica should have come from the east, and in 
the fifth edition of Gray’s Manual the given range includes even 
‘Pennyslvania?” It is entirely wrong, however, to apply the 
name P. pennsylvanica to our coast plant, which I described under 
the name P. litoralis. 
Linnaeus did not describe his Potentilla pennsylvanica from a 
plant collected in Pennsylvania but from plants cultivated in 
the gardens of Europe under that name. Jacquin, in his Hortus 
Vindobonensis, illustrated it under that name, and if I am not 
mistaken Linnaeus had received his specimens from Vienna. 
Dr. Wolf, who admits P. litoralis as a good species states: ‘‘ This 
[P. pennsylvanica var. communis T. & G.: P. missourica Schrader] 
is the true P. pennsylvanica of Linnaeus, the one figured by Jacquin, 
the one cultivated in the botanical gardens since Linnaeus’ time 
and for long time escaped in the vicinity of Paris.” Dr. Wolf 
therefore fully supports my interpretation of P. pennsylvanica. 
What it is, anybody may ascertain for himself by looking up the 
