132 BOTANICAL GAZETTE [avcust 
2. Development of the ovule 
The ovule of August 8 shown in figs. 7 and 8 is younger, I think, 
than that of Stangeria as figured by Lane (2), and about the same 
age as that of Ceratozamia shown by TREUB (3). The megasport 
mother cell is easily picked out at this stage as a larger cell, which 
group 
Fics. 7, 8.—Fig. 7, young ovule (August 8), showing (by dotted line) 
cells arising from archesporium. X 136; fig. 8, detail of fig. 7, showing ™ xo 
mother cell, adjacent tissue dividing, and flattened cells (c) bounding nucellus- 
more vacuolated and which has a large nucleus with the chromat? 
arranged in a fine network. The cells about it stain rathet can 
deeply, and toward the chalazal end there are several rows of flatte 
cells (c) which stain still more deeply, and which form 4 aio 
to the ovule in this direction. These rows curve up about the sf ; 
Togenous group” and meet the epidermis at the point what. 
integument and nucellus are separated from each other. 
