97 



WOODSIA:— 



Fi^. 190. Woodsia alpina. From left to right: sclerine stratification ( 



distal face (x 1000); LO-patterns. 



X 



2000); 



XIPHOPTERIS:— 



Fig. 191. Xiphopteris saffordii. From left to right: lateral view (x 250); proxi- 

 mal face (sm-face and optical cross-section; x 1000); exine stratification 



(X 2000). 



