11 
venes, in fair weather, from the developement of one stamen to 
that of the other in Lemne. G. ENGELMANN. 
The expression “ artificially raised” is perhaps too strong to ex- 
press the condition of plants found to be in a flowering stage and 
= in a dish for a few days to allow them to show their blos- 
ms. Eps. 
19, Exchanges—Chas. Keck, Ems, Upper Austria, desires to ex- 
change European for American plants, through the proffered agency 
of the Smithsonian Institute.—A. H. Curtiss of Liberty, Virginia, 
Wishes to exchaage a large number of species for an equivalent 
made up by one or several N. Y. botanists. We have his marked 
catalogue.—Dr. I. S, Moyer, of Quakertown, Pa., wants U.S. plants; 
we have a partial catalogue.—Jacob Hammond, Victor, N. Y., local. 
—E. L. Hankenson, Newark, N. Y., especially Salicacew, Cypera- 
cex, and Filices. Dr. Geo. Engelmann, of St. Lous, desires “an 
authentic native living plant (or joint) if possible with fruit,” of 
our New York Opuntia, or Prickly Pear. 
20, To Correspondents.—We are deficient in reports from West- 
chester Co., and New Jersey, especially the district between the 
Raritan and Ocean. We request the friends of the cause, in all di- 
rections, to search out the botanists, and bring them into commu- 
nication with us. This year we hope to see a considerable acces- 
Sion to the number of our subscribers. 
21. Publications received —1. Musci Appalachiani: Tickets of Speci 
mens of Mosses collected mostly in the Eastern Part of North America, 
by C. F. Ausrim, comprises a number of new species, and one new 
genus, Micromitrinm, We hope to hear from the Cryptogamists of 
the vicinity. —2. Archives of Science, and Trans. of the Orleans Co. 
Soc. of N +. Sci., Newport, Vi., Vol. I, Nos. 1&2. Among the con- 
tents are a general notice of the Flora of Vermont, by Prof. George 
H. Perkins ; and a list of the Vermont Equisetacex and Filices, by 
Chas. C. Frost. Among the ferns, we notice the rare Pella gract- 
lis, Hook., and Wuodsia glabella, R. Brown. 
22. Spring.— Acer dasycarpum, Ehr., was in full bloom in Brooklyn. 
Meh. 13th, cee | Is. M. 
23, Solidago elliptica, Ait.—Mr. Olney has kindly sent his duplicates 
of this species to Dr. Torrey, for the benefit of the Club. In com- 
paring the leaves in shape and texture with those of S. altissima, — & 
» We meant not to im 
Torr. & Gray. 
HIERACIUM, Tourn.—H. Canadense, Mchx.; New Jersey, Closter, Austin; — 
Long Island, Union and Woodhaven, Ruger, Glen Cove, Coles; — 
Westchester Co., W. H. L.—H. seabrum, Mchx.; N. Y., O.W.M.; © 
common ; but we have no report from Westchester Co. except 
_ the general statement in the State Flora, that it is “common 
in the vicinity of N. Y.”—IL. Gronovii, L.; common ; but not re- 
ply any doubt of its affinity to S. neglecta, 
