68 



MORPHOLOGY OF GYMNOSPERMS 



whole habit suggesting that of one of the taller species of Cycas. 

 The stem was covered with rhomboidal scars, and the strobili were 

 borne on long (20-30 cm.) stalks covered with spirally arranged scale 



S2^- 



^$^^::>- 



FiG. 56. —Williamsonia gigas: restoration showing stem with leaf scars, crown 

 of leaves, and two spherical and peduncled strobili. — After Williamson (3). 



leaves, and arising within the crown of leaves. This species of Wil- 

 liamsonia differs from the other Bennettitales chiefiy in these long 

 peduncles. In Williamsonia angustijolia (fig. 57), whose leaves have 

 been called Anomozamites minor, the small strobili occur singly in 



