XXVIII] 



REPRODUCTIVE SHOOTS 



21 



FIG. 392. A. Cycas pectinata, apex of megasporophyll. (f nat. size.) 

 B, C. Cycas Riuminlana, megasporophyll. (f nat. size.) 



D. Encephalartos Altensteinii. Distal end of megasporophylls. (From 



the Gardeners' Chronicle.) 



E, F. Cycas angulata, microsporophyll and sorus. 



G, I. Ceratozamia mexicana, I, microsporophyll with scars of sori (s) ; 



G, sorus. (After Thibout.) 

 H. Stangeria paradoxa, megastrobilus. 



