—13— 
“DIE EUROPAEISCHEN TORFMOOSE.” 
A Correction. In my notice of this work in the November issue of the 
Bryologist (Vol. IX, p. 102) there is an unfortunate slip as to the number of 
plates. There are eleven and not eight as stated in my notice. 
Wm. Edw. Nicholson, 
Lewes, 17th Nov., 1906. 
IS PHYSCOMITRIUM IMMERSUM A GREGARIOUS MOSS? 
John M. Holzinger. 
This pygmy in the genus to which it is referred, according to Mrs. E. G. 
Britton’s account in her Revision of the Genus Physcomitrium in Bull. Tor. 
Club, Vol. 21, No. 5, May 25, 1894, has an extensive range from New York to 
Kansas, from Colorado to Quebec. I have had it under observation near 
Winona, Minn., for over twelve years, looking up its haunts annually. In 
all these years I have never succeeded in finding more than a few plants in 
a tuft, the little plants seemingly preferring to stand alone, isolated , among 
the hepatics which seek the same moist substratum. The three hepatics, 
among which I uniformily find it, were recently determined for me by Dr. 
A. W. Evans as Ricciocarpus natans (L.) Corda, Riccia fluitans L., both 
terrestrial forms, and Anthoceros Macounii M. A. Howe, which last determ- 
ination Dr. Evans had verified by Dr. Howe himself. Incidentally, Dr. 
Evans points out, this extends the range of Anthoceros Macounii into the 
United States, its type station being in Canada, One or the other of these 
terrestrial hepatics, and in some cases even all of them, may be found asso- 
ciated with P hyscomitriu 7 n immersum sent out by me, and indeed the nature 
of its recurrence here compels me to include an excess pf these hepatics with 
a relatively scant amount of the Physcomitrium, Another plant that will 
frequently be found in the pockets is Ephemerum crassinervium with its great 
abundance of protonema. P hy scomitrium immersum will be distributed in 
fascicle ten of my Musci Acrocarpi, now in process of preparation. 
Winona, Minn. 
SULLIVANT MOSS CHAPTER ANNUAL REPORTS 
REPORT OF THE PRESIDENT. 
The past year has been one of great prosperity for the Sullivant Moss 
Chapter: a gain of thirteen per cent, has been made in the membership ; the 
intensive study of local floras has increased: especial interest has been mani- 
fested in the study of the lichens and hepatics, as is shown by the increased 
space devoted to them in the last volume of the Bryologist: and the vari- 
ous herbaria belonging to the Chapter are fast becoming of consulting value 
to students of the distribution of North American Plants. 
At the founding of the Chapter, one purpose was to bring the various 
isolated moss students throughout the country into closer touch with one 
another. As evidence of the success of this plan, it is only necessary to con- 
sider the contributions which are constantly being made by Chapter mem- 
t 
