58 

 DICKSONIA:— 



Fig. 101. Dicksonia yoiingiae. From left to right: lateral view (x 250); distal 

 (di) and proximal (pr; smface and optical section) face; LO-patterns. 



DIPLAZIUM:— 





Fig. 102. Diplazium proliferum. From left to right: proximal face (x 2oO); 

 sclerine stratification (x 2000); lateral, longitudinal view (x 1000); LO- 

 patterns. 



DIPTERIS: 



Fig. 103. Dipteris chinensis. P>om left to right: hiteral, longitudinal view 

 (X 250); distal face (x 1000) and exine stratification (x 2000); LO-patterns. 



