Vol. Hl. No.3.) BULLBTIN OF THE TORREY BOTANICAL CLUB. [New York, March, 1871. 
14, “Herbarium Suggestions.’ —Our friend, Dr. Gray, has kindly sent 
me some criticisms and suggestions with regard to the article that 
appeared in the last number of the Bulletin, under the above 
heading. 
_Dr. Gray says: “I intended that my Genus covers should be 
sixteen and a half inches long; the paper for species sixteen and 
three-eighths. I find that as much difference in Jength as will work 
well when the sheets are rather numerous in the same cover, and 
when they are shoved—as is usually done—quite back into their 
compartments. Your space of one-half inch will all be found in 
front, i.e., at the bottom margin. This does not look well, and 
the projecting margins are liable to become curled or dog-eared.” 
[I have not myself experienced any difficulty of this kind. F. J. B.] 
Dr. Gray adds: “Again I find it best to have the Genus covers 
first folded in quarter qnires or so, and then trimmed to twelve in- 
ches on the front edge. This makes the inner sheets a little 
narrower and with a sharper fold on the back,—advantages for 
small or monotypic genera, for which I reserve them; while the 
outer sheets, by their slightly greater width and the rounded fold 
at the back, are adapted for larger genera or sections.” F. J. B. 
15. Characee.—For some years I have been much interested in 
the study of our Characes, and especially since I have obtained the 
beautiful specimens issued by Braun, Rabenhorst, & Sitzenberger, 
by means of which I have been enabled to identify some species. 
T have received a few from Mr. CO. C. Frost of Brattleboro, Vay 
acurately named ; and Mr. Le Roy has given me some specimens 
he has picked up. These, with my own collections, make but a 
beginning ; and I should he glad to receive these interesting plants 
from all parts of the country, especially if collected when in fruit, 
<9 male and female plants when, as often, - are yaaoeanyet a 
urope as many as differgnt species, including a great number 
of varieties, i eit nearly one third of which belong to the - 
genus Nitella. I have received great help from Prof. A. Braun of 
Berlin, who has named many species for me, and determined one 
new and beautiful variety— 
1. Nitella acuminata, A. Br., var. subglomerata.—I have gathered at 
Morristown, N. J. Prof. Braun says it is not rare in the 
warmer parts of the United States, but is not found at all in 
Europe. 
2, Nitella aia A. Br., var. microcarpa—tI have probably from 
New Jersey ; this is not found in Europe. oe 
3. Nitella tenuissima, Desv.—was collected by Mr. Le Roy at Peekskill | 
on the Hudson. 
4, Nitella synearpa, Thuill.—I have received from Mr. Frost of Brat . 
tleboro, Vt. : a eee 
5. Nitella capitata, Nees ab E.—is quite common 1n the small streams — 
on Long Island, appearing in the spring (as in Europe). 
6, Nitella flexilis, L.—I ee received from Mr. Frost. The variety 
subeapitata I find very abundant in Litchfield Lake, Ct. 
