115 



PELLIA: 







Fig. 231. Pellin epiphijlla; part of a spore, optical section and surface (x 1000); 



exine stratification ( ' '2000). 



PHASCUM: see Fig. 236 A, p. 117. 



PLAGIOCHASMA:— 





Fig. 232. Plagiochasma intermedium; a, proximal face (x 1000) and LO- 

 patterns; b, one half of an elater (x 1000). 



