CYCADALES 



109 



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

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



leaf of Ceraiozamia 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 variously serrate (figs. 84-89), while in Macrozamia 

 heteromera they are dichotomously branched. In Dioon edule the 



