<% 
I 
m sj •» 
57 - Veins free, sori oblique to midrib of leaflet ,..• 60 
I . - • - 
53 - Sori continuous .. 
58 - Sori interrupted 
59 - Plants without trunk, fronds pinnate, 8-18 inches long ... * *. Blechnum 
often over 18 inches long .. 
60 - Sori double or crossing vein .•. 
60 - Sori single, on one side of the vein.... Asplenium 
GENERIC 
SYNONYMY 
Adxantura 
•Cyclosorus 
Amphor ad enium 
Polypodium in part 
Aspidium in part 
Dryopteris in part 
Fhegopteris in part 
Asplenium 
Excluding presently recognized 
Athyrium 
Cyrtomium 
Aspidium in part 
Dryopteris in part 
Athyrium 
Asplenium in part 
Diplazium 
Phanerophlebia 
Cystopteris 
Filix 
Azolla 
Dicranopteris 
Blechnum 
Gleichenia in part 
Martensla in part 
Botrychium 
Diellia 
Callistop teris 
Trichomanes in part 
Lindsaya in part 
Excluding presently recognized 
Loxoscaphe 
t 
Ceratopteris 
Doodia 
Cibotium 
Doryopteris 
Coniogramme 
Gymnogramme 
Pteris in part 
Dryopteris 
Aspidium in part 
Ctenitis 
Aspidium in part 
Dryopteris in part 
Nephrodium in part 
Phegopferis in part 
Phegopteris 
Polystichum in part 
Excluding the presently recognized 
Ctenitis, Cyclosorus, Lastrea 
