PLATE 38 
1. —Same as Plate 37, figure 2, but from an embedded stained section. It can be 
seen that the pith cavity is irregular and that the second xylem-phloem ring is farther 
from the pith cavity on the left side than it is on the right side. It is also more 
irregular than the normal xylem phloem—that is, at top and bottom. The heavily 
stained cells in the pith are those which show white (dead) in Plate 37, figure 2. The 
interrupted dark line a little way in from the pith cavity is another cambium, not 
accompanied by vessels. 
2. —A detail of the second xylem-phloem ring showing irregularities more distinctly. 
Planar enlargement. 
3. —Sieve plate from second xylem-phloem ring. X650. 
. 4.—Distorted sieve tube from third (imperfect) xylem-phloem ring. X650. 
