1877.] Plants in New Hampshire and Vermont. 98 
A few species seem to have found the valley of the Ashuelot 
River better suited to their growth than the main river valley 
north of its mouth. We find the flowering dogwood ( Cornus 
florida) at Hinsdale ; Sagina procumbens, Cyperus filiculmis, and 
C. strigosus, common along the plains of Keene and Swansey ; 
and in the swamps, Symplocarpus fetidus, which attains a greater 
range than the others, having established itself in the bogs around 
the base of Monadnock. 
In the Merrimack Valley andthat part of New Hampshire 
east of it, Canadian plants are fewer in numbers, both of species 
and individuals, than in the same latitude of the Connecticut Val- 
ley. Also, owing probably to the greater distance from the 
high lands, and to being much nearer the ocean, we find many 
Alleghanian species which do not extend in the Connecticut Val- 
ley farther north than Central Massachusetts. 
It is somewhat surprising to any one familiar with that part 
of New Hampshire occupied by the Connecticut and its tributa- 
ries, to find the district belonging to the Merrimack the richest 
floral region in the State, and this, too, notwithstanding that the 
soil is not nearly so fertile. But it only proves that the warmer 
temperature of Eastern New Hampshire is more than enough 
to compensate for any decrease in the number of species that 
might be brought about by a less fertile soil. 
We here find that the species traced throughout the former 
region do not seem to arrange themselves in groups with wide 
intervals between them, nor do their limits always appear in the 
same order, 
In the Pemigewasset valley the frost grape first appears near 
the mouth of the East Branch, but nothing is seen of sheep laurel 
(Kalmia angustifolia) and sweet-fern (Comptonia asplenifolia) 
until near Plymouth, twenty miles further south. Arbor vite 
(Thuja occidentalis) stops near the south line of Thornton, but 
its companion, Alnus viridis, continues somewhat common to 
where the junction of the Pemigewasset and Winnipesaukee riv- 
ers forms the Merrimack. 
A short distance south of the mouth of the East Branch, near 
the south line of Campton, Pinus rigida, P. resinosa, and gray 
bireh (Betula alba, var. populifolia), make their appearance, and 
the white oak ( Quercus alba) before reaching Plymouth, but the 
chestnut is wholly wanting north of the mouth of Smith’s River, 
a short distance below Bristol. Rhus copallina is abundant at 
Livermore's Falls, just north of Plymouth. Vaccinium vacillans 
