62 Rhodora [Marcu 
are glabrous. Intermediate forms between the species and the variety 
are in Nantucket always associated with plants representing the type 
of the variety. 
ARNOLD ARBORETUM. 
AN INTERESTING LOCALITY. 
E. B. HARGER. 
PisrAPAUG (or PAvG) Pond is a natural pond of manifest glacial 
origin, about three-fourths of a mile long and a third as broad 
lying at the intersection of the four towns of North Branford, 
Guilford, Wallingford and Durham about twelve miles northeasterly 
from New Haven, Connecticut. It is mostly within the limits of 
Wallingford and Durham about one-half in each. On the east of 
the pond (the Durham side), one of the characteristic trap-ridges of 
the region, known as Pistapaug Mountain rises from the water's edge 
more than 200 feet above the pond which itself is at an elevation of 
some 400 feet above sea level. ‘To the northwest is another trap hill; 
and a highway skirts closely the northern border of the pond and runs 
through the pass between the two hills. Westward is a broad tract 
of cleared land and to the south lie low wooded hills, where doubtless 
runs the old valley now dammed with glacial drift. 
In the spring of 1903 I found in the Eaton Herbarium at New 
Haven a specimen of Polymnia Canadensis L., collected in 1880 by 
Prof. O. D. Allen and labeled “Trap slide near Paug Pond, Durham, 
“Conn.” Iimmediately formed the resolution of exploring the region, 
but had no opportunity of doing so until Sept. 15, 1905. On this trip, 
almost at the first sight of a “trap slide" I found the Polymnia, but 
on the Wallingford side of the pond. However, on crossing to the 
slopes of Pistapaug Mountain I found the plant in great abundance, 
both near the foot and near the top of the talus-slope, which here 
runs directly into the water. The remoteness of the locality from 
houses and the extent of territory over which the plant is spread 
seem to indicate that is not of recent introduction, but may be con- 
sidered native to Connecticut. 
Although the main object of the trip was fulfilled by the re-discovery 
of Polymnia, the further results were very gratifying. At the base 
