Table of the Genera of Ferns. 



Anomalous 



Indusium continuous, sori linear, continuous, covering 

 all or nearly all the space between the midrib and 

 margin, fronds dimorphous, capsule ring vertical . 



As in Lomaria, but capsule ring oblique . 



TRIBE VII.— BLECHNE.E. 



Indusium linear or oblong parallel with the midrib 

 and opening towards it, not near the margin. 



Indusium membranaceous, distinct from the margin of 

 the frond, parallel with and usually contiguous to 

 the midrib, veins free ...... 



As in Blechnum, only veins anastomosing 



Indusium linear-oblong, thick, in single rows parallel 

 with and near the midrib, sori sunk in cavities 



Indusium lunate, thin, in one or more rows, parallel 

 with and near the midrib, sori not sunk 



TRIBE VIII.— ASPLENIE.E. 



Indusium linear or oblong or horseshoe-shaped, 

 opening towards the midrib, sometimes double, sori 

 attached to the veins. 



Indusium linear, single, veins free, their apices com- 

 bined by a transverse marginal vein 



Indusium linear or oblong single, veins free 



As in Asplenium, but indusium more or less curved . 



As in Asplenium, but indusium double 



As in Diplazium, but veins anastomosing . 



As in Asplenium, but veins anastomosing obliquely 

 only towards margin of frond .... 



Indusium sausage-shaped, veins anastomosing and 

 forming elongated areoles ..... 



Indusium linear elongated, submarginal, fronds fan- 

 like 



Genus. 



32 Ceratopteris 



33 Lomaria . 



34 Plagiogyria 



Page. 

 . 123 



125 

 127 



35 Blechnum 



• 130 



36 Blechnidium 



. 133 



37 WOODWARDIA 



• 135 



38 DOODIA 



• 135 



39 Thamnopteris . 137 



40 Asplenium . 141 



41 Athyrium . 161 



42 Diplazium . 174 



43 Anisogonium . 191 



44 Hemidictyum . 194 



45 Allantodia . 195 



46 Actiniopteris . 197 



