24 



CYCADALES 



[CH. 



sporophylls of Ceratozamia (fig. 393, C) : in Macrozamia (fig. 394) 

 the distal ends are prolonged as tapered processes. The surface 

 of the strobilus of Stangeria is formed by imbricate and rounded 



FIG. 395. Zamia floridana. I a, complete plant ; a, main trunk ; 6, branch-scar ; 

 c, secondary root; d, primary tap-root. (| nat. size.) 16, I c, megastrobilus. 

 (J nat. size.) Id, megasporophyll. ( nat. size.) I e, pinna, (f nat. size. 

 After Wieland.) 



ends of sporophylls (fig. 392, H) not unlike the cone-scales of 

 Pinus excelsa or P. cembra. The megasporophylls of Zamia are 

 expanded into regular cushion-like hexagons with a flat central 

 area (figs. 389, B; 395, 16). 



The microsporophylls (figs. 389, A; 392, E) are in all genera 



