100 Rhodora [May 
may represent a more primitive condition than typical I. biflora, 
since the development would have been from the more to the less 
regular and, in the former, the petals would naturally have been of the 
same size or more nearly so. 
Flowers and Petals (the latter removed and spread out) of Impatiens biflora 
(figs. 4-6) and of f. platymeris (figs. 1-3). 
In f. platymeris the erect upper sepal tends to be less concave than 
in the typical form. 
About eight plants of the new form were found, growing intermingled 
with numerous individuals of the typical form and, except for the 
floral characters, in no way different from them. As the characters 
of f. platymeris are not readily seen in herbarium material, patches of 
jewel-weed were examined at every opportunity during the rest of 
the season in an effort to find it elsewhere; but without success. Mr. 
Walter Deane and Dr. A. S. Pease have very kindly made similar 
search in the White Mountain region where, a memory of uncom- 
monly large jewel-weed flowers suggested to me, this form might 
occur; but they likewise failed to find it. 
East HARTFORD, CONNECTICUT. 
