RypperGc: Nores on ROSACEAE 499 
In neither case did I find a single specimen that could be referred 
to P. nivea. At the Colorado station it was associated with P. 
saximontana and P. uniflora, but was easy to distinguish, especially 
from the latter. In the collections at the New York Botanical 
Garden there are eighteen sheets of P. guinquefolia, representing 
sixteen localities. I have seen perhaps as many more localities 
represented in other herbaria, and have seen no sheets on which 
it was mixed with P. nivea proper. We have only four sheets of 
P. nivea from the Rocky Mountain region. When I visited Copen- 
hagen in 1901, I confused P. rubricaulis with it and named a 
specimen of the latter P. subquinata. This was due mostly to 
the fact that I had a wrong idea of P. rubricaulis Lehm. and had 
applied the latter name to what appears in the North American 
Flora as P. rubripes Rydb. Dr. Simmons has cleared up P. 
rubricaulis Lehm. in such a way that nothing more needs to 
be said, except perhaps that he could have made plainer the dif- 
ferences between the trifoliolate P. rubricaulis var. arctica and 
P. nivea L., taken in such a broad sense as Dr. Simmons has done. 
Of the specimens collected by Pedersen and referred to P. sub- 
quinata by me, no. 496, as represented in the New York Botanical 
Garden herbarium, is a form of P. nivea L., with some quinate 
leaves. It is intermediate between P. nivea macrophylla and P. 
nivea subquinata. Nos. 113 and 233 belong to P. nipharga Rydb., 
which also sometimes has quinate leaves. The other numbers 
are not represented here. There is none referable to P. quingue- 
folia, which seems confined to the Rocky Mountains of the United 
States and Northwestern Canada. 
Closely related to P. quinquefolia, perhaps a depauperate 
variety thereof, is P. modesta Rydb., described as new in the North 
American Flora. It is confined to two mountain chains in Utah. 
It differs from P.-guinguefolia, besides in the smaller stature, in 
the linear and obtuse instead of lanceolate and acute bractlets, 
the golden yellow petals only 4 mm. long, and the dense inflores- 
cence, reminding one of that of P. Hookeriana. The following 
specimens belong to it: 
UraH: Mount Barrette, July 26, 1905, Rydberg & Carlton 
7261, 7259, and 7258; Sierra La Sal, 1899, C. A. Purpus G, Q, 
and R. 
