RvDBERG : Notes on Rosaceae 407 



To /. Tiveed)'i belong, besides the type, tlie following specimens : 

 Washington : Cascade Mountains, 1882, T. S. Brandegee. 

 I. callida (Hall) Rydb. was transferred from Potentilla, and 



placed in the /. cremica group, although not so closely related to 



the other members. 



PURPUSIA 

 P. saxosa is still unknown except from the type locality. Other 

 specimens have been referred to this species, as for instance. Heller 

 82gy, but this belongs to Pofentilla acuviinata Hall ; some others 

 belong to Potentilla saxosa Lemmon. Ivcsia Baileyi may also be 

 mistaken for it. The few pistils on a stalked receptacle and the 

 absence of bractlets distinguish it at a glance from all three. 



COMARELLA AND StELLARIOPSIS 



These two genera were treated as in my monograph. 

 New York Botanical Garden. 



