[From the Bulletin of the Torrey Botanical Club, 41: 319-332. 22 July 1914.] 



Notes on Rosaceae — VII* 



Per Axel Rydberg 



• || ' a y y 



ALCHEMILLA vew * 



In the North American Flora this genus is taken in a narrow (!a»<o£». 

 sense, i. e., as Linnaeus originally understood it. The genus 

 Aphanes L., which was merged in Alcliemi.Ua by Scopoli, differs 

 not only in the habit, being leafy-stemmed annuals, instead of 

 scapose perennials with rootstocks, but the stamens are usually 

 solitary, rarely more numerous, and opposite to one or more of 

 the sepals, instead of being 4 and alternate with the sepals. The 

 disk in the throat of the hypanthium, so characteristic of the typical 

 Alchemillas, is almost obsolete in Aphanes. 



The so-called Alchemillas of America are perennials, some of 

 them in habit not so unlike the Old World species; but in all the 

 stamens are only 2 and inserted on the inside of the disk instead 

 of the outside, and the anthers extrorse instead of introrse. For 

 these the subgeneric name Lachemilla of Focke was adopted, 

 except for one species of exceptional habit, which was made into a 

 distinct genus Zygalchemilla. 



All the species of true Alchemilla have their home in Europe. 

 Only five of them are either adventive or naturalized on this side 

 of the Atlantic and all are confined to the northeastern corner of 

 North America. 



Alchemilla alpina L. ranges in America from Greenland to the 

 island of Miquelon and the White Mountains of New Hampshire. 



* These notes, continued from Bull. Torrey Club 38: 367 (ion), are supple- 

 mentary to the monograph in volume 22 of the North American Flora. 



319 



