46 AMERICAN FERN JOURNAL 
examined are rather uniform; the leaves are either 
crenate-pinnatifid throughout or are furnished with 
one or two distant, nearly circular, free pinnae below. 
BoraNIsKE MusEuM, COPENHAGEN. 
A New Polypodium from Vermont. 
H. C. RIDLON. 
In the late autumn of 1919, an acquaintance of mine, 
while gathering material to fill berry-bowls, collected, 
among other things, some small polypodiums which 
were growing in their usual habitat upon a bowlder. 
Some few weeks later my attention was called to two 
of these ferns which differed very much from the others 
in their short, rounded pinnae, but which were un- 
mistakably polypodiums. Through the kindness of 
the collector, these two plants were given to me, and 
were transferred to a glass bowl where they were care- 
fully watched to see what forms any new developing 
fronds might assume. Both plants survived the first 
winter and each produced several new fronds which 
were of unusual form but in which the pinnae and tips 
of the blades were more elongated. One plant died in 
July of this past year and the other, still alive, has been 
transferred from the covered bowl to an open receptacle, 
in hopes it may produce fronds more like those it pos- 
sessed when first discovered. 
All available articles on the American forms of Poly- 
podium vulgare have been carefully looked over, also 
Druery’s excellent book on ‘British Ferns and their 
Varieties,’”’ but I find no form described which ap- 
proaches this one. 
In one plant the fronds were lacking tips except for-a 
short projection of the rachis. In the other specimen 
the fronds terminated in an elongated tip; otherwise the 
