^go General Botany 



cies the sporangia develop in the axils of every leaf ; in the more 

 specialized types the sporangia occur in cones of modified scales, 

 or sporophylls. 



In Lycopodium the spores are all alike, and when they ger- 

 minate produce green, fleshy thalloid gametophytes, or thick 

 underground tuberous gametophytes. The subterranean ga- 

 metophytes are saprophytes, and in the other species they are 

 partial saprophytes. Each gametophyte produces both sperms 



Fig. 303. Two species of club mosses {Lycopodium). In the species on 

 the left {Lycopodium lucidulum) the sporangia are borne in the axils of 

 the upper leaves ; in the other {Lycopodium clavatum) they are borne 

 in the terminal cones. 



