RypBERG: Notes on ROSACEAE 501 
pharga,and P. uniflora are included. Dr. Simmons states further: 
“In the Index Kewensis, it is referred to P. multifida L., where its 
right place seems rather to be.’’ This statement was made after 
Dr. Simmons had seen the original specimens of Bunge. It is not 
unlikely at all that its relationship is with P. pinnatifida, but the 
plate illustrating it does not resemble so much P. pinnatifida as 
P. Hookeriana. The latter is also intermediate between the 
NIVEAE and the MULTIFIDAE groups, both in habit, the congested 
inflorescence, and the fusiform style. I can not agree with Dr. 
Wolf in regarding P. altaica as merely a form of P. nivea pinnati- 
fida in the sense he uses the name. I refer the following specimens 
to P. nipharga: 
MACKENZIE: Fort Good Hope, 1861-2, 7. S. Onion (type). 
ALBERTA: Rocky Mountains, Drummond 368. 
Urtau: Sierra La Sal, 1899, C. A. Purpus A, C, L, and H. 
GREENLAND: Vajat-shore, Disco, Morten Pedersen 113; Un- 
artuarsuk, Disco, Morten Pedersen; Onjigsak, Disco, Morten Peder- 
Sen 233. 
Potentilla Pedersenit Rydb. was based upon P. subquinata 
Pedersenti Rydb. In describing the latter I had only one collec- 
tion in flower, viz., Morten Pedersen 470, and the description was 
drawn wholly from that. Laying too much stress upon the pe- 
culiar rootstock of this species and almost overlooking more 
essential characters, I referred carelessly to it several sterile speci- 
mens with a similar rootstock. These do not belong to it and 
Dr. Wolf is fully correct in his criticism of me for basing the 
variety on a mixture and for including in it specimens which he 
refers to P. nivea and var. subquinata. The type specimen he 
regards as a small-flowered P. Wahliana. With this I can not 
agree. Itis true that it has something of the habit of P. Wahliana, 
the long hairs, although not yellowish, of that species, and the 
pubescent upper surface of the leaves; but it does not have the 
large, broad, and overlapping petals of P. Wahliana, or the oval 
or elliptic obtusish bractlets characteristic of that species and P. 
villosa. It has the flowers of Potentilla nivea. It could be a 
hybrid of P. nivea and P. Wahliana. 
Dr. Wolf regards both P. uniflora and P. Hookertana as vari- 
