_ The Club meets regularly the last Tuesday of the monthinthe Herbarium, Columbia College, at 744 P- 
20 
from Mosses downwards, “ somewhat like Hedwigia.” 5 shillings 
sterling, post free. Address M. C. Cooke, 2, Grosvenor Villas, 
Junction Road, London, N. 
23, Quereus and Salix—After reading De Candolle’s experience m 
determining the species of Quercus, one with more limited means 
of comparison may well hesitate before pronouncing positively. 
The stable distinctions necessary for classification are not always 
to be found, though the conviction remains that such distinctions 
must exist The scientific study of the variations of specific forms _ 
is one of the most pressing needs of Biology. We shall welcome 
any observations tending in this direction. The opening season 
will soon afford an opportunity for a study of the Willows of our — 
district, about which we are quite unfurnished with data, Weim- — 
vite those of our friends who have the opportunity to study this 
family to communicate the results to us, and specimens to the : 
Club Herbarium. a. 
_ Of Quercus bicolor, Willd., Mr. Austin writes that it is “most neat- 
ly related to (). macrocarpa, Mchx. The acorns are perfectly sim 
lar in both, and unlike in some respects those of any other species + <4 
a true White Oak.” Of Q. prinus, L.: “I have never been able to q 
see wherein the var. monticola differs from this.” Messrs. Austin 4 
and Allen both express a decided conviction that Q. tinctoria 18 ® 
very distinct species. That Oaks may hybridize, we have received 
from Dr. Engelmann a remarkable example in a specimen labelled . 
“ Quercus palustris-imbricaria, hybris, near St. Louis, single tree, 
May, 1870.”—We had supposed the Chestnut Oak, Q. prinus, Vale 
acuminata, to be one of our most common Oaks, but finding no 8p — 3 
cimen from this region in our possession, we referred to the State 
Flora, where Chemung Co. is the only locality given. We have — 
found it in Connecticut, and Gray’s Manual says it iscommon™ — 
the Middle States. 
BROUSSONETIA, Vent.—B, Papyrifera, Vent. ; Laurel Hill, L. 1, Ruger — 
fruits finely in Greenwood Cemetery, W. H. L.; frequent ™ 
cultivation or springing up from suckers. ’ oe 
URTICA, Tourn.—, fracilis, Ait. ; common ; N. Y.—U. dioica, L. ; not E 
rare about roadsides ; N. Y.; Staten Island; Bergen Hill; , 
. Train’s Meadow, etc., Ruger ; Glen Cove, Coles. : 
LAPORTEA, Gandichaud.—tL, Canadensis, Gaud.; common; N. Y5 
Fort Washington, W. H. L. : 
PILEA, Lindl—P, pumila, Gray ; very common ; N. Y. ey 
BOEHMERIA, Jack.—B, cylindriea, Willd. ; “In shady swamps, Bloom 7 
ingdale and Weehawken,” Torr. Cat., Central Park, R. & P.5 | 
Closter, common, Austin ; rather common on L. L ; the vat) 
B. lateriflora, by Bedford Creek, Ruger. 
Ferms—One dollar for one copy ; 
copy, per annum. 
iceman’! 
Jive dollars for seven; and half a dollar for every addition® ' 
Local Herbarium, 3, B. 33d St.—Rditor, 224, B 10th St. 
