49 



Spokes. Each, spore is yellow, and finely pitted. 

 It has a thin exospore provided with excrescences, 

 and an inner layer — endospore — of pure cellulose. 

 Its cavity is filled with colourless protoplasm, chloro- 

 phyll grains, starch and oil. 



It germinates at once, and gives rise to the thalloid 

 stem. 



ALTEENATION OF GENEEATIONS. 



Spore produces Thalloid Stem ) Oophyte 



Thalloid Stem produces Sexual Organs ( Generation. 



Sexual Organs produce Sporogonium ) Sporophyte 

 Sporogonium produces Spores. ( Generation. 



The Sporophyte is parasitic upon the Oophyte 

 Greneration. 



6*^ GY^ (sr^OCe) GY^ Ke) 



