Table of the Genera of Ferns. 



Genus. Page. 



Indusium apical, compound, suborbicular, only open at 



the top 19 Stenoloma . 68 



Indusium medial on a vein membranaceous, hood- 



1 ke 20 Cvstopteris . 70 



TRIBE V.— LINDSAYE.E. 



Indusium apical on the veins, in a continuous or 

 interrupted line, the outer valve being the margin of 

 the frond, the inner membranaceous. 



Veins free 21 Lindsaya . . 72 



Veins anastomosing ...... 22 Schizoloma . 77 



TRIBE VI.— PTERIDE.E. 



Indusium oblong or linear, formed of the more or 

 less changed and reflexed margin of the frond, open- 

 ing inwardly. 



Indusium globose to linear usually many and distinct, 

 sometimes confluent and continuous, bearing the 

 capsules on its under side, veins free 



Indusium roundish and distinct, or more or less con- 

 fluent but not continuous, capsules on the frond 



Indusium as in Pteris, the ultimate segments of fronds 

 small and very narrow ...... 



As in Pellaja, but fronds dimorphic .... 



Indusium quite continuous, sori at first dot-like, but 

 soon running into a line ..... 



Indusium quite continuous, sori linear continuous, 

 occupying a slender filiform receptacle in the axis 

 of the indusium, veins free ..... 28 Pteris . . 104 



A- in Pteris, but lowest veins meeting and forming 

 anarch 29 Campteria . 116 



As in Pteris, but veins all anastomosing without free 



included veinlets ....... 30 DORYOPTERTS . 120 



Al in Ptois, but veins all auas'omosing wiili some 

 free included veinlets ...... 31 Litobrochia . 120 



23 Adiantum 



82 



24 Cheilanthes 



88 



25 Onychium 



95 



26CRYPTOGRAMME 



98 



27 Pell.ea. 



98 



