. 
P. rubripes.t 
RYDBERG: NOTES ON ROSACEAE 83 
Potentilla Bruceae is related to P. Breweri, but differs in the 
fewer, broader, closely approximate pairs of leaflets. It is known 
from the type locality only. 
Dr. Wolf includes the group in the GRACILEs group, which he 
divides into two divisions. The first, GRACILES PINNATAE, compri- 
ses my GRACILES, RUBRICAULES (except P. rubricaulis Lehm.), 
and SuBjJuGAE. He makes Potentilla propinqua Rydb. (P. diffusa 
A. Gray, not Willd.) a variety of P. Hippiana, and both P. colora- 
densis and P. rupicola varieties of P. effusa. If the author can be 
accused of splitting up the species too finely, Dr. Wolf especially 
in this case can be accused of lumping together rather clearly 
distinct species. P. propingua, as known from field study, shows 
itself very distinct from P. Hippiana, but much less so from the 
typical P. pulcherrima. Sereno Watson saw this close relationship 
and united the two under the name P. Hippiana var. pulcherrima. 
The main differences are that P. propinqua is usually lower, de- 
cumbent at the base, and its leaves have 9 leaflets, directed some- 
what forward; while P. pulcherrima is usually taller, more erect, 
and its leaves have generally only 5-7 leaflets, of which the lower 
are spreading or even reflexed. Concerning the relationship of 
P. pulcherrima to P. gracilis and P. filipes, see my remarks in the 
BULLETIN OF THE TORREY BOTANICAL CLUB 37: 491. 28 O IgI0. 
Dr. Wolf proposes a new species, Potentilla Osterhoutiana.* 
I have not seen the type nor any duplicate thereof. From the 
description, it seems to me to be a luxuriant form of P. rubripes 
or else the same as my P. viridior. I have written to Mr. Oster- 
hout for material, but he has answered me that he has no speci- 
mens of the number cited by Dr. Wolf. He does not know what 
itis. From the date and locality given he thinks that it may be 
MULTIJUGAE 
This group contains, in the North American Flora, sixteen 
species, of which Potentilla klamathensis, P. versicolor, and P. Nel- 
* Bibl. Bot. 16: 200. 1908. 
+ After this article was written, Mr. G. E. Osterhout has sent me a specimen, 
Osterhout 1502, which he thinks might be P. Osterhoutiana. It is an unusually large 
specimen of P. rubripes. The only thing that speaks against this being a duplicat® 
of the type of P. Osterhoutiana is that it was collected July 12 instead of July 20. 
