386 Rydberg : Notes on Rosaceae 



statement he bases on specimens received from me, collected at 

 Chambers Lake, Col. In the Chamber's Lake collection, dis- 

 tributed by the Agricultural College of Colorado and named by me, 

 large specimens of P. glaucophylla and rather small ones of P. jn- 

 cunda were mixed. I did not notice this fact when the specimens 

 were sent out and Dr. Wolf may have received specimens of the 

 former instead of the latter. 



In the New Manual of the Central Rocky Mountains the 

 author of the name Potentilla jucunda has reduced it to a synonym 

 of P. Nuttallii, but it differs in the total lack of the glandular 

 pruinosity characteristic of that species, in the thinner leaflets, 

 and less prominent veins. 



As an appendage of this group, I added two Mexican species, 

 P. oaxacana Rydb. and P. Goldmani Painter, with thicker 

 leaves and but 5 leaflets to the basal leaves. They are known only 

 from the type localities. 



New York Botanical Garden. 



