1881. | Botany. IOOI 
receptacle is distinctly conical, and as my 1859 edition of Gray says, 
under the generic title, “receptacle flat,” I must acknowledge 
the kindness of Dr. Daniels, in identifying the plant from Nuttall’s 
description.—£, Lewis Sturtevant, South Framingham, Mass., Oct. 
Ig, 1881. 
CERATOPHYLLUM DEMERSUM IN Fruit.—Gray, in his Manual, 
Says that Ceratophyllum demersum L. is “ common but rarely seen 
in fruit.” I have to-day the pleasure of finding the plant in this 
somewhat uncommon condition.—Dr. Alfred C. Stokes, Trenton, 
Aug. 30, 1887. 
Botanica Nores.—The opening address before the Geographi- 
cil Section of the British Association for the Advancement of 
Science, was given this year, by Dr. J. D. Hooker. Very natur- 
ally the address was principally concerned with the geographical 
distribution of plants, which was reviewed historically. A 
Briggs calls attention, in the Yourzal of Botany, to the fact, that 
hybrids occur between some of the species of Apilobium, and de- 
scribes one between &. hirsutum and E. montanum. WHave our 
Species been observed to hybridize ? De Bary is publishing in 
the current numbers of the Botanische Zeitung, an important paper, 
on the Peronosporee. If possible a summary will be given in these 
columns before long. The “ Catalogue of the Plants of Indiana,” 
which has been publishing in parts as extra sheets in the Botant- 
cal Gazette, has appeared in pamphlet form. In all there are re- 
corded 1432 species of flowering plants and vascular cryptogams. 
Valuable notes are appended to many of the species. The 
“characteristic forest trees are the poplar (Liriodendron ), maple, 
ash, elm, black and white walnuts, oak, hickory, beach, syca- 
more.” The authors (Professors, J. M. and M. S. Coulter, and 
C. R. Barnes) further state in their preface that “the flora of the 
State is readily divided into four groups, each marked by the 
named order from the Uredinee, her 
them.. The reviews of Pfeffer’s new book on the Physiology 
: of Plants ( Pflanzen ph rysiologie, Ein Handbuch des Stoffwechsels 
und Kraftwechsels inder Pflanze. Band 1. Leipsig, 1881) indicate 
__ that when completed, it will be a most valuable acquisition to: 
