258 The Botanical Gazette. (August, 
dentate margin has been added ; larger, stronger veins have been form- 
ed and it is really become a strawberry leaf. Did not this single leaf- 
p let, in the sometime of 
G; the past, give off the 
j two lateral leaflets, mak- 
ing it trifoliate? Does 
not fig. 3, give us an 
affirmative answer to 
Our question? The 
transition forms (figs. 5, 
6, 7,) have followed the 
same law in the devel- 
opment of these added 
leaves, which was sug- 
gested in the deyvelop- 
ment of the trifoliate 
from the ancestral type. 
Descriptions of leaves 
ordinarily cover but the 
golden mean. Fig. 418 
the only one which 1s 
recognized as having 4 
' legitimate place among 
RS RSS the leaves of the straw- 
®\ Aut del SIH \ = berry. The others are 
ss IS either “poor relations 
: a which should remain 10 
VARIATIONS OF THE LEAF OF THE STRAWBERRY. the background, or are 
too prosperous to remain in the humble household. 
But the leaves tell their own story so simply and so well that oné 
needs but to give ear unto it in order to understand the progressive 
steps from the primitive leaf up to the possibilities of the future repre 
sented by fig. 8—Mrs. W. A. KELLERMAN, Columbus, Ohio. ~ 
On the development of the embryo-sae of Arisema tip 
(WITH PLATE XVIII.)—The origin of the angiosperms and the a 
telationship between monocotyledons and dicotyledons are among t 
esent A e 
Primitive group from which the dicotyledons have been derived, e .: 
dicotyledons may be looked upon as the primitive group, 2m) 
em. 
