384 RypBERG: NoTes ON ROSACEAE 
The only species in North America which resembles it in leaf- 
form is P. angustata Rydberg, proposed as new in the North Amer- 
ican Flora, but this is much more closely related to P. Nuttallit. 
It is known only from the type collection. 
The new species proposed in this group are Potentilla angustata, 
P. grosse-serrata, P. rectiformis, P. amadorensis, P. macropetala, 
P. Parishii, P. dascia, and P. lasia. 
Potentilla grosse-serrata was based partly on material referred 
by me in my monograph to P. Blaschkeana. As treated there, the 
latter species was composed of a mixture of P. grosse-serrata, P. 
glomerata A. Nels., P. dascia Rydb., and the true P. Blaschkeana 
Lehm. I shall give a further discussion under the latter species. 
Some of the more typical specimens of P. grosse-serrata are here 
given: 
CALIFORNIA: Donner Lake, 1865, Torrey 121 (a); Bridges 98; 
between Igera and Weed, 1905, Heller Sog2; (Geological Survey 
1860-7) Rattan 234. 
NEVADA: Ruby Valley, 1868, S. Watson 3309. 
WASHINGTON: Vasey 322. 
When preparing the manuscript of my original monograph, 
I had two specimens, rather fragmentary, of Potentilla rectiformis. 
One was doubtfully and hesitatingly referred to P. recta, the other 
to P. pectinisecta. The following specimens belong here: 
WASHINGTON: Pullman, 1896, Elmer 29, ‘‘Kuskuske and 
Fort Vancouver,” Wilkes. 
Montana: Spanish Basin, 1897, Rydberg & Bessey 4370. 
Potentilla amadorensis is known only from the type locality. 
Potentilla macropetala resembles much in habit P. glaucophylla 
but has much larger flowers. The stem is also much stouter and 
and the plant much coarser, wherefore it was placed here rather 
than in the Macutatar. To this species I refer the following 
specimens: 
CALIFORNIA: Laguna, 1894, Schoenfeldt 3576; 1866, Bolander 
50306; San Diego, Palmer. 
OrEGON: Tillamook, 1894, Lloyd. 
Potentilla Parishii is closely related to P. Hallii and the first 
specimens seen were referred to that species by me a few years 
ago, but it differs in the fine appressed instead of spreading and 
