Table of the Genera of Ferns. 
IX 
Genus. Page. 
Indusium apical, compound, suborbicular, only open at 
the top .19 Stenoloma . 68 
Indusium medial on a vein membranaceous, hood- 
Ike 20 Cystopteris . 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, bsaring the 
capsules on its under side, veins free . . -23 Adiantum . S2 
Indusium roundish and distinct, or more or less con- 
fluent but not continuous, capsules on the frond . 24 Cheilanthes . 88 
Indusium as in Pteris, the ultimate segments of fronds 
small and very narrow 25 Onychium . 95 
As in Pellaea, but fronds dimorphic ... . . 26 Cryptogramme 98 
Indusium quite continuous, sori at first dot-like, but 
soon running into a line . . . . -27 Pell^\ . . 98 
Indusium quite continuous, sori linear continuous, 
occupying a slender filiform receptacle in the axis 
of the indusium, veins free ..... 28 Pteris . .104 
As in Pteris, but lowest veins meeting and forming 
an arch -29 Campteria . 1 16 
As in Pteris, but veins all anastomosing without free 
included veinlets . . . . .• . .30 Doryopteris . 120 
As in Pteris, but veins all anas'omosing with some 
free included veinlets ...... 31 Litobrochia . 120 
