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A STATION FOR EPHEMERUM NEAR NEW YORK CITY 
Daisy J. Levy 
For a number of years the woods of Pelham Manor, a small village immedi- 
ately north of Pelham Bay Park, on Long Island Sound, have been my favorite 
collecting grounds. The particular locality explored is rather thickly wooded, 
a brook on one side of it and on the other low ground, rather wet, owing to in- 
undations from the Sound. 
On Sunday, September 9, 1917, I came upon a patch of Fissidens taxifolius, 
a moss often before collected in these woods, but this colony being particularly 
interesting in that the plants grew in broken patches from about five inches to a 
foot or more square. Becoming curious as to the ecological factors concerned 
I sought about for the protonemal growth, eventually finding a small patch 
with what appeared to be protonema, but which was discovered, upon examina- 
tion with the hand lens, to be one of the minute forms of mosses. After further 
microscopical study the moss was determined as Ephemerum serratum var. 
angustijolium Schimp., this conclusion being based upon the facts that the 
spores were smaller than in E. serratum Hampe, and that the leaves were much 
narrower and more distinctly serrate. After having been kept for four months 
in a preparation of glycerine and alcohol the material was sent to Dr. Nichols, 
who pronounced it E. serratum, but too much shrunken for exact determination, 
while together with it he found E. crassinervium and with it another form ‘‘some- 
what puzzling in its smoother leaves and papillose calyptra.” 
New York City. 
REVIEWS 
“The American Species of Marchantia ’’ 1 
by Alexander W. Evans 
In this monograph we have a clear and able treatment of the American 
species of Marchantia which has been much needed and which will be highly 
appreciated by students of the Hepaticae. 
In the Introduction there is given a history of the treatment of the species 
of the genus as reported from America, this account having been extricated 
from the much involved and confused reports. Into the melting pot went all 
the species accredited to America by various botanists, nothing being taken for 
granted. The keen eye of the master having detected flaws in some of' the old 
points of contact in comparisons and descriptions, these were dropped for more 
reliable characters, and it was then found, after the most careful examination 
and after various reductions to synonymy and the placing of five doubtful 
species at the close of the paper, that nine species, including a new one, could be 
retained. 
Part II, Morphological Notes on the Genus, contains many statements by 
Goebel, Leitgeb, Schiffner, Stephani, Mueller, and others, which are examined 
1 Trans. Conn. Acad. Arts and Sciences 21 : 201-313. March, 1917. 
