1884. ] Botany. 533 
corns the softer tissue extends to the apex of the kernel, and is 
bounded by a column of corneous tissue on each side; the soft 
corns have no corneous tissue; while the sweet corns are com- 
posed of a translucent and more or less shriveled corneous 
er, 
Each of these species is divisible into several sub-species or 
races, which exhibit remarkable permanence. In fact, one of the 
unlooked-for facts brought out by these observations of Dr. Stur- 
tevant, is the permanence of the several types, whether of species 
or races, as indicated below. 
The following general conclusions are recorded: 
“Cross-fertilization of the current year is manifested on the 
Kernel and not on the ear, and this influence is not reciprocally 
strong as between the races !species] or even the sub-races, an 
the resistance to current hybridization is more strongly marked 
in some races [species], sub-races or varieties than in others. 
ma Hybridization in the seed used produces a variety of ears, but 
“acà ear in general is quite close to one of the parent types; an 
intermixture of kernel in no case seems to be produced. ` Recip- 
focal fertilization between two races [species] does not seem to 
be productive of equal effect.” 
aad SEVENTH FASCICLE OF NORTH AMERICAN PLANTS.—This 
come package, with its fine specimens, was distributed to 
tists in February. Like its predecessors it contains many 
ka e great interest, especially to Northern collectors. Most 
collects ATURALIST readers are aware that Mr. Curtiss has been 
: mind for many years in Florida, and that his specimens have 
ate way into most of the great herbaria of this country 
urope, 
ces ae the sake of the younger botanical writers to be able to 
ation for the 
3 
fo * l ; 
from Welle Pressions which have evidently been boldly copied 
have hag © 'Cliable text-book, the pupils in the schools would 
P ~ no reason for complaining; but, as is inevitable in such 
; Well; htni , the several parts so brought together do not fit 
4 The a, » We find statements in one part contradicted gon . 
Preparati nt is made on page 4 that the author has in 
~~ fa manual of the wild flowers of the northern United 
! Pei ®wever, had this questionable method of compilation 
