CYCADALES 



"5 



three to six cones arranged symmetrically about the apex, so that 

 in these cases there is no sympodium, but a continuous vegetative 

 apex, with axillary cones, as in the Bennettitales. 



/ V 



I V I 



9T 



96 



98 



Figs. 96-98. — Zamiafloridana: fig. 96, longitudinal section of apex of stem, showing 

 a young staminate cone; v, lateral stem tip; /, very young leaf; fig. 97, longitudinal 

 section of apex of stem, showing two young staminate cones; v, stem tip; I, young 

 leaves; fig. 98, diagrams based upon preparations like those shown in figs. 96 and 97; 

 a, sympodium, showing relations of strobili, crowns, and trunk; 6, the same with 

 internodes shortened; c, internodes shortened until the cones are on a level, as in 

 Zamia. — After F. Grace Smith (56). 



The length of the staminate cones varies from 2 cm. in some species 

 of Zamia to more than 50 cm. in species of Encephalartos and Cycas. 



