436 BOTANICAL GAZETTE [MAY 
Fic. 2. —Longitudinal section through the center of the embryo shown in 
fig. I. 
Fic. 3.—Cross-section of a young sheath above the region of the growing 
point of the stem. 
Fic. 4.—Exterior view of an older embryo, showing differentiation of 
both se of the sheath. 
IG. 5.—Longitudinal section (partly reconstructed and diagrammatic), 
showin the first leaf, the growing point, and the behavior of the vascular 
S. 
Fic. 6.—Cross-section through the root cylinder of the older embryo. 
1G. 7.—Cross-section of the cotyledonary node, showing the independent 
origin of the four bundles. 
Fic. 8.—Cross-section just above the cotyledonary plate; the four 
bundles have assumed the vertical position 
IG. 9.—Cross-section above that uiceiecud in fig. 8, showing the stem 
cylinder. 
Fic. 10.—Section pense the preceding, showing the first leaf and the 
growing point. 
Fic. 11.—Cross-section above the tip of the second leaf. 
Fic. 12.—Cross-section just above that shown in fig. 11; it shows the tip 
of < oe leaf. 
. 13-—Cross-section above the tip of the first leaf; shows the space or 
slit rei the two sides of the sheath. 
Fic. 14.—A section showing the fusion of the Bes bandigs to make two; 
it was made immediately above that shown in fig. 
Fic. 15.—A section near the tip of the sac yon of the sheath, giving 
the appearance of two cotyledons lying side by side. 
Fic. 16.—A cross-section in the upper part of the sheath. 
