XXXVI] 



CYCADEOIDEA 



405 



FIG. 529. Cycadeoidea dacotensis. Transverse sections of a young ovulate 

 strobilus! A, near the summit of the strobilus 2 cm. below the surface of 

 the armour of leaf-bases, showing numerous bracts surrounding the recep- 

 tacle and embedded in a mass of ramenta, also sections of some leaf-bases 

 with vascular bundles. B, in this section, 2-5 cm. below A, the peduncle of 

 the strobilus is seen with a cylinder of vascular bundles ; 6, a bract belonging 

 to an adjacent strobilus. (After Wieland; nat. size.) 



