384 Rydberg : Notes ox 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. Nattallii. 

 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 w T as 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 q8; 

 between Igera and Weed, 1905, Heller 80Q2; (Geological Survey 

 1860-7) Rattan 234. 



Nevada: Ruby Valley, 1868, S. Watson 339. 



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 4379. 



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 Maculatae. To this species I refer the following 

 specimens: 



California: Laguna, 1894, Schoenfeldt 3576; 1866, Bolander 

 5036; 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 



