THE SEEDLING AND YOUNG PLANT 
marked /,/, and these 
run chiefly in what 
may be called the faces 
of the five-angled stem ; 
only, at the node where 
the leaf we are consi- 
dering is inserted, they 
turn in towards the leaf, 
and eventually they run 
into the sides of the 
petiole of the leaf as 
the so-called ‘ lateral 
strands,’ or bundles. 
Now, observation 
shows that these lateral 
strands (marked J, /?, /3, 
&ec., in the diagram, 
fig. 11) receive contri- 
butions at successive 
Fie. 11.—Diagram of the 
course of the vascular 
bundles as they come 
down from the leaves into 
the stem. The horizontal 
dotted lines represent the 
levels of successive leaves ; 
the triangular white area 
beneath the upper letter z 
is the insertion of a leaf. 
Each group of bundles 
from a leaf,as mm, ms, ms, 
45 
&e. (see text), descends into the stem, and joins with the bundles 
from other leaves after running through several internodes. The 
other letters refer to the bundles from other leaves. (After Frank,) 
