36, 
THE GREY POPLAR. 
Populus canescens. 
Phate 5, Fia. 3. 
Pi 
y<:REATER similarity exists between 
the Grey and the White Poplars 
than between any other of the four 
species described in this volume. 
Both have rounder leaves than 
iyi! Populus nigra, with lobed instead 
mh of indented margins, and both are, unlike 
Pd the Black Poplar, covered on their under 
x sides with white down. Both, too, are 
veined, in a very similar manner, having a mid- 
vein with other two principal veins branching 
from it at the base of the leaf, and giving origin 
to wavy and forked veinlets. The distinction, as 
