68 Rhodora [ MARCH 
dew falls and is taken up in such measure by lichens that their tissues 
cannot be in condition to absorb vapor. 
GENERAL Conclusions. Experiments have been made upon several 
classes of plants—some of them not mentioned above— which are 
asserted by one authority or another, of greater or less trustworthiness, 
to profit largely by their power of absorbing water in the gas form. 
A few figures, representative of a considerable number of tests, have 
been given in these notes. While these tests have seemed conclusive 
as regards the identical material employed, a much longer investigation 
would be required to enable one to make a general statement as to the 
direct utility of atmospheric moisture, as such, to actively vegetating 
plants. What I have seen tends to create in my own mind a doubt of 
any such utility. 
Tur Ames LABORATORY, North Easton. 
FURTHER ADDITIONS TO THE FLORA OF THE AMHERST 
REGION. 
RoraNp M. HARPER. 
On examining recently a copy of Tuckerman and Frost's Cata- 
logue of plants growing without cultivation within thirty miles of 
Amherst College (1875), I found that several plants which I had 
collected or observed within the limits of this catalogue during the 
past season were not mentioned in it. 
A circle of thirty miles radius, with Amherst College as its center, 
would include, along its eastern edge, the greater part of Sturbridge, 
the whole of Brookfield, and several other towns in Worcester and 
Hampden Counties which I explored more or less in 1899. 
The plants listed below are from these towns, and unless otherwise 
noted are new to the * Amherst region." Stations enclosed in paren- 
theses have been already mentioned in my last list of additions to the 
flora of Worcester County (RHODORA, 1: 201—205), where further de- 
tails concerning them may be found. 
Potamogeton gemmiparus, Robbins. In Quaboag Lake, Brookfield, 
September 4 (altitude 615 feet). Also in a small pool in a meadow- 
in Sturbridge, September 17 (altitude 560 feet). This species was 
collected in Amherst in September, 1874, by Prof. H. G. Jesup, but it 
