[Vol. 2 



118 



ANNALS OP THE MISSOURI BOTANICAL GARDEN 



remain and develop the minute gametophyte ; archegones very 

 much reduced, including little more than the egg, which is 



Fig. 1. Chart to show relationship of the orders. Relationship is 

 indicated by position ; the areas are approximately proportional to the 

 number of species in the orders. 



fecundated by the non-ciliated sperms (male nuclei) from 



tubular antherids 



t> 



format 



of an embryo 



