1910] SMITH—ZAMIA FLORIDANA 129 
1. Development of the strobilus and the sporophylls 
Plants gathered early in June show a slight elevation which elon- 
gates to form the strobilus, but at this stage it is impossible to dis- 
tinguish the ovulate strobili from the staminate. As stated in my 
description of the staminate 
plants (1), the strobili are 
deeply sunken in the tip of 
the crown and are completely 
covered by the bases of the 
rosette of leaves. 
A strobilus of July § is 
about 5 mm. long, and at this 
time can be recognized as 
ovulate. There are defined 
in a median longitudinal sec- 
tion five sporophylls on a 
side (fig. 1), A comparison 
with a staminate cone of 
July 8, with eleven sporo- 
phylls on a side, gives ap- 
proximately the same length, 
but greater breadth and larger 
sporophylls than those of the 
Staminate cone (fig. 2). : 
In comparing crow: Fo tf tnd! an 
Sections of strobili of July 25, Gulre) grrr Pi longitudinal section of 
Much the same points are young staminate strobilus, showing sporophylls 
Noticed. Astaminate (July8). x40. 
strobilus (fig. 3) has on an ; 
average fourteen to sixteen sporophylls on a cross-section, while the 
ovulate strobilus (fig. 4) has seldom more than ten. A difference in 
the size of the sporophylls as well as of the strobili is seen also. 
The development of the sporophylls is identical in the two strobili, 
at least in these early stages, except that the elevation representing the 
Sporophyll in the ovulate strobilus is broader and includes more cells 
in a hypodermal position which are dividing periclinally. As the 
sporangia appear, there are fewer meristematic points on the ovulate 
N 
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