1921} JEFFREY & TORREY—HERBACEOUS ANGIOSPERMS 25 
with a greater number of amphivasal bundles. In / the strands 
in the pith have reached their maximum number and are beginning - 
to undergo fusions with the bundles of the wall of the cylinder. 
: a 
Me @ i) TP 
AG: be 
Fic. 4 
The foliar traces are very numerous here as in Sanicula. In g 
and h are represented nodal sections of Zea. In Athe leaf base has 
just fused with the axis and shows a very large number of bundles. 
In the central region of the stem many horizontal and vertical 
