XII 



LEP TOSP ORA NGIA TAL HE TEROSP ORE^ 



397 



part decays. The wall of the macrosporangium does not 



B 



;/-Mi 



^^. 



Fig. 205. — AzoUa filiculoidcs (Lam.). A, Mature sporophyte, X2; B, lower surface of a branch 

 with two microsporangial sori (sp), x6 ; C, macrosporangial (w«) and microsporangial (ini) 

 sori, X 10. 



become absorbed, as Strasburger ^ states, but remains intact, 

 though very much compressed, until the spore is ripe. 



■' Strasburger (6), p. 71. 



