4i6 



MOSSES AND FERNS 



CHAP. 



B. 



Mi 



S^. 



Fig. 242. — Azolla Uliculoides. A, Mature sporophyte, X2; B, lower surface of a branch 

 with two microsporangial sori {sp), X6; C, macrosporangial {ma) and microspo- 

 rangial {mi) sori, Xio. 



