so THE HABIT AND THE HABITAT OF FERNS [ch. 



Fiff s6. A— F=MaiieticciaSirut/iwpteris {h.),Todaro; A==a.feiti\e^ndasten\e\ea.{,shov/ingha.bit-, B-a. 

 sterile pinna; C=a fertile pinna; /? = part of a fertile leaf with venation and son; ^=transverse 

 section through a fertile pinna; A=:sorus with indusium. G—L=Onoc/easensihhs, L. G_ habit; 

 J7=a sterile pinna; /=a fertile pinna; A'=a fertile pinnule; Z = sorus with indusium. (A, L>—/^, 

 after Luerssen ; /— Z, after Bauer; B, C, G, //, after Diels. From Engler and Prantl.) 



