23 



Fig. 36. Chamaecyparis lawsoniana; niegaspore membrane (surface), phase 

 contrast. < 4000. (From von Liirzer in Grana palynologica, 1: 2, lO-ifi.) 



Fig. 37. Cupressus arizonica; megaspore membrane (surface), phase contrast. 

 X 4000. (From von Liirzer in Grana palynologica, 1: 2, 1956.) 



