CORMOPHYTA 



4* 



Product of sexual amalgamation : 

 The sporophyte 



The sporophyte develops : 



Further stage 



Sporogonium (Seta and 

 capsule or capsule 

 only) 



Fern-plant 



Plant 



Embryo with 2 

 or more coty- 

 ledons. 



Embryo with 1 

 or 2 cotyle- 

 dons. 



Plant 



Sp 



ores 



Numerous sporangia 

 and spores. 



Two kinds of spor- 

 angia, arranged in 

 one spike, producing 

 microspores and 



macrospores. 



Mostly two kinds of 

 cones (exc. Cycas), 

 one with pollen bags 

 and one with naked 

 ovules. 



a. A green protonema ; 



b. The plant 



Prothallium, 9 , mostly 

 green and expanded. 



Rudimentary 

 lium. 



prothal- 



$ : Pollen grain. 



g : Prothallial tissue 



within the nucellus of 



the ovule. 



Plant 



$ : Pollen grain. 

 $ : Nucellus with embryo- 

 sac. 



Flowers with stamens 

 and one or more 

 ovules enclosed in a 

 pistil. Both organs 

 either in the same 

 flower or separate. 



The vertical double line indicates the break in the cycle, viz. the period of rest 

 and dissemination. 



M. 



