90 



HORSETAILS AND CLUB MOSSES 



Reproduction. There appears to be but one type of spore 

 produced by Equisetum, at least no physical or structural 

 difference can be noted, but there must be a physiological 



FIG. 50. Equisetum arvense. A, Male gametophyte with one antheridium 

 B, female gametophyte with archegonia. 



FIG. 51. Equisetum arvense. Enlarged antheridium and above two 



sperms. 



