BULLETIN 
OF THE 
TORREY BOTANICAL CLUB. 
Vol. X.l New York 
[No. 2 
Fresh-Water Algae. VII. 
By Francis Wolle- 
(Plate XXVII.) 
The following latest Information concerning fresh-water algse is 
submitted for the benefit of numerous friends to the cause of micro- 
scopical botany, as well as of botanical research in general. 
During the past summer there have been abundant additions 
made to this particular division of the flora of the United States — a 
result largely due to the kindly assistance of volunteer collectors in 
the more distant parts of the country, as also of others nearer home. 
Indeed, but for these, the microscopist would often be at a loss for 
specimens worthy of his attention. I take pleasure in connection 
with this in acknowledging the valuable aid received from Rev. H. D. 
Kitchel, D.D., in working up the material that was gathered from 
various sources. 
As the number of American students of the fresh-water algre 
has greatly increased during the past few years, I have yielded to a 
general desire, and given the diagnosis of new species in the English 
language. Hitherto our students have been greatly outnumbered by 
European, and therefore the descriptions were given in a language 
^familiar to all, irrespective of their nationality. With this change I 
adopt also the metric system of measurements. 
In the appended list of new plants, all those credited to Minne- 
apolis, Minn. J were collected and forwarded by Miss Eloise Butler of 
that place. Miss Butler, first a student under Prof. C. E. Bessey of 
botanical fame, then a member of the Summer School of Science, 
under Prof. J. C. Arthur of the Iowa Agricultural College, Charles 
City, has, in her contributions sent me for microscopical investiga- 
tion, furnished much more that is new than has any other collector 
this year. 
Mr. A. D. Balen, of Plainfield, N. J., has been particularly fortunate 
in establishing beyond controversy the fact that the tropical alga 
Pithophora^ Witt., is not confined to the tropics. Hitherto I have 
found it only in one small pond in this vicinity, where it was sup- 
posed to occur adventitiously- Mr. Balen finds it in three distinct 
localities within a circuit of about six miles around Plainfield. 
r 
Of new foreign literature upon the subject of fresh-water algae, 
the following are the most important contributions ; 
Two volumes of the series Algie Exsiccates have .been issued by 
Prof. V. Wittrock and Dr. Otto Nordstedt of Sweden, The two 
volumes are the 9th and lothofthe series. Each number contains 
fifty specimens, European and American, finely mounted. No words 
