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1. Two spores of O. moluccanum. showing range in size. X 500. 



2. Two-celled gametophyte ot O. moluccanum. 



3. A three-celled stage. 5p, ruptured spore membrane. 



4. A four-celled stage, seen from above. 



5. Two transverse optical sections of a four-celled gametophyte. 



6. Three-celled gametophyte of O. inlermeciium Hk. 



7-9. Young gametophytes of O. pendulum L.. showing mycorthizal 

 infection, m, mycorrhiza! filaments. 



10. Aduh gametophyte of O. moluccanum. X 10. /, hasal tuber; 

 }-i , anthendia. 

 11-14. Gametophytes of O. pendulum. /\ 3. h, adventitious buds; 

 sp, young sporophyte. 

 15. Upper part of ripe antheridium of O. pendulum. / Tib. 

 o, opercular cell. 

 16-20. Development of the spcrmatozoid m O. moluccanum. > 950. 

 bl, hiepharoplasts. 



