404 



BENNETTITALES 



[CH. 



I- 



Fig. 528. Cycadeoidea dacotensis. Longitudinal section through a bisporangiate 

 strobilus; s, folded microsporophylls with synangia; o, receptacle bearing 

 short megasporophylls and interseminal scales; a, eroded surface of bracts- 

 /', ramenta between the bracts and leaf -bases; I, leaf -base; c, cortex of stem- 

 (, Tascular cylinder of peduncle. (After Wieland; nat. size.) 



