1910] SMITH—ZAMIA FLORIDANA 133 
In the region of the nucellar apex, the cells are constantly divid- 
ing as the nucellus increases, but this cell activity is not confined to 
that part of the ovule. On either side and below the mother cell there 
is constant division, as is shown in sections through the mother cell 
Fics : ; : 
ag peg i ll. X136; fig. 10, 
detail of “ 1g. 9, older ovule, showing megaspore mother ce 3 fig 
* 9 ShoWing large increase in nucellar apex. 930. 
ae Sections adjacent to it. Often there are three spindles in a 
before oe — This megaspore mother cell enlarges somewhat 
tree again, while the nucellus by repeated periclinal 
flat outl; (figs. 9, To) is becoming extended. This changes the broad, 
one. "mf the projecting portion to a narrower, more pointed | 
* The integument keeps pace in its development and narrows 
