CYCADALES 



109 



edidc often have more than 100 leaflets on each side of the rachis. 

 The number increases gradually with the age of the plant, the first 





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leaf of Ceratozamia having two or four leaflets, while the leaf of a 

 fully grown plant has as many as 100. The margins of the leaflets 

 are entire or ^•ariously serrate (figs. 84-89), while in Macrozamia 

 heteromera they are dichotomously branched. In Dioon edule the 



