390 BOTANICAL GAZETTE [NOVEMBER 
surface film apparently is an active factor. Through the lack of 
space for vertical succession, the several outgrowths from the 
apical region are liberated as a horizontal series, the overlapping 
of successive individuals forming an element of confusion in an 
examination of their structure. 
Texas AGRICULTURAL EXPERIMENT STATION 
COLLEGE STATION, TEXAS 
EXPLANATION OF PLATE XIV 
Fics. 1, 2.—Early stages in formation of axillary buds: magnification, 
indicated by scale of 0.05 mm., uniform for all figures except fig. 9, which has 
its special scale indicated. 
Fic. 3.—Median section of older bud: 6, daughter bud rudiment; a, axil- 
lary it 
4.—Similar section at next stage: buds displaced by thickening of 
— 4a, ae of root from adjacent section. 
Fic. 5.—Adjacent sections of bud in axil of nearly grown seed (to left), 
showing daughter bud and root regions; axillary bud not yet defined; inter- 
mediate in age between figs. 2 and 3 
Fics. 6, 7.—Daughter buds from opposite sides of median section shown 
in fig. 4; 7a, axillary bud the edge of which shows at a in fig. 7. 
Fic. 8.—Sagittal section of frond, showing origin of inclosing scale leaf 
or pouch (,p) about stra bud (0); below the root is pushing out, and to 
the — the leaf is elongatin; 
nsverse rere through apical region of frond, showing dis- 
saris gee of daughter bud, now unequally developed, and connecting 
cells; compare figs. 2 and 3; low power. 
IG. 10.—Young frond in sagittal section: leaf forms right half; basal 
buds partly inclosed by bud scale or pouch (at 10a and nid. ; axillary bud at 
10b, with edge of buds (a and c) and of pouch wall (p). 
