12 

 CEPHALOTAXUS:— 





B 



fci^7 /#^ •/■:■■ v:--!^ 



^c-;t.. . -. .'^'..'■■.■■i.-.'./f 



Fig. 14. A, Cephalotdxiis dnipacen; a, pollen grain with evaginated tenuitas 

 (lateral view, x 1000); b, pollen grain with invaginated tenuitas (distal face, 

 X 1000). B, C. nana, exine stratification (x 2000). — The drawings for this 

 figure were ready before the electron micrograph, PI. I, Fig. 2, was taken. 

 The white counterpart ("endonexine") to the lamellar layer in the EMG is 

 clearly seen. Superimposed on the "endonexine" is a l)lack layer ("ecto- 

 nexine") corresponding, it would seem, to the granular part of the "nexine" 

 shown in the EMG. Also with regard to sexine details there is an obvious 

 similarity between P'ig. 14 and the EMG, PI. I, Fig. 2. 



CHAMAECYPARIS:— 



Megaspore membrane: Chamaecyparis lawsoniana, see Fig. 36, p. 23. 

 Pollen grains: Chamaecyparis pisifera, see Fig. 42 A, p. 26. 



CRYPTOMERIA:— 



Fig. 15. Cryptonieriajaponica. From left to right: 

 pollen grain in lateral view, surface (x 250); 

 pollen grain (distal face invaginated) in lateral 

 view, surface and optical section (x 1000); 

 exine stratification ( x 2000). 



CUNNINGHAMIA: 



Fig. 16. Cunninghamia lanccolata. From 

 left to right: distal face (upper detail- 

 figure; X 250), LO-patterns (lower detail- 

 figure); lateral view, surface and optical 

 section (distal face invaginated; x 1000); 

 exine stratification ( x 2000). 



