Vol. 38 : No. 7 
BULLETIN 
OF THE 
TORREY BOTANICAL CLUB 
ee 
AUGUST, tgI11 
Notes on Rosaceae—VI 
Per AXEL RYDBERG 
ARGENTINA 
In an article in Rhodora for January 1909, Prof. M. L. Fernald 
discussed ‘‘The Representatives of Potentilla Anserina in Eastern 
America.’’ The second paragraph of his article reads as follows: 
“‘In November, 1908, two extensive monographs of Potentilla 
appeared, but when one turns to these two treatments with the 
hope of settling his long-standing problems the results are cer- 
tainly disheartening.’’ And then, ‘‘after spending some days* in 
the study of the material in the Gray Herbarium and the Herbarium 
of the New England Botanical Ciub,’”’ he solves the problems. 
Fifteen years have now passed since I began my work on Potentilla 
and Dr. Th. Wolf has devoted longer time than that to the study, 
and neither of us has definitely settled the status of the different 
forms of this group. When the manuscript of my monograph in the 
North American Flora went to press I had seen not only the col- 
lection in the Gray Herbarium but also those of the New York 
Botanical Garden, Columbia University, United States National 
Herbarium, Philadelphia Academy, and the College of Pharmacy, 
New York. When preparing my original monograph, printed in 
1898, I had also seen the collection of the Missouri Botanical 
Garden. Besides, many of the critical species had been sent to 
me for determination by the University of California, Mr.T. S. 
Brandegee, Mr. Parish, and many others. 
* Italics are mine 
{The BULLETIN for tae IQII (38: 307-350. pl. 13-15) was issued 27 Jl rottr.] 
351 
