1914] Knowlton,— Flora of the Sandy River Valley 17 
There were also clumps of Agropyron caninum. To me, however, the 
best find of the day was Phryma Leptostachya in Mercer, where it 
grew in dry alluvial woods with Circaea Lutetiana. 
As this single day below New Sharon secured me fourteen species 
I had never collected in the region before, I feel confident that further 
exploration of the lower river will bring to light many other interesting 
plants. 
Ranunculus septentrionalis is a frequent plant on many of the New 
England rivers, and I am considerably at a loss as to its scarcity along 
the Sandy. I have found it only once by the river at Farmington. 
It grows in one place on a tributary at least a mile from the river, and 
I found it in a clayey ditch at Stark, well back from the river. It 
seems to be very rare. R. repens I have found well introduced at 
Farmington and New Sharon. 
In closing, I will mention the few genuine aquatics which I have 
found in the river. There are quiet reaches in its lower and middle 
course, and in such places Isoëtes echinospora, var. Braunii is common. 
Nymphaea microphylla is occasional, and there are several species of 
Potamogeton. Of these I have identified P. amplifolius, P. dimorphus, 
P. bupleuroides and P. epihydrus. The water in the creeks is stagnant, 
and often dries up completely, so they do not furnish a desirable 
habitat for aquatic plants. 
For the convenience of any who are interested in the region, I add 
the following list of Ruopora articles about Franklin County plants. 
Eaton, Lit.uiAN O.: Orchids of Chesterville, V, 82, 1903; Plants 
of Chesterville, IX, 207, 1907; Plants of Chesterville, XI, 30, 1909. 
JEwEkLL, H. W.: Notes on Some Ferns of Franklin County, IV, 247, 
1902. 
Know tron, C. H.: On the Flora of Mt. Abraham Township, I, 
191, 1899; On the Flora of Chesterville, II, 123, 1900; Flora of Mt. 
Saddleback, V, 35, 1903; On the Flora of Day Mt., VI, 206, 1904. 
HiNGHAM, MASSACHUSETTS. 
