Index to Genera 
Acrosticum 19 29 32 40 48 LycorpopiuM 
ADIANTUM 7 26 Lycopodium 
ANCHISTEA 7 28 LyGopium 
Aspidium 38—45 MARGINARIA 
ASPLENIUM 7 30 MaRSILIA 
Asplenium 35—37 MatrEuccia 
ATHYRIUM 7 35 Muscus 
Blechnum 28 Nephrodium 
BotTrycHium 6 10 ONOCLEA 
Camprosorus 7 37 OPHIOGLOSSUM 
CHEILANTHES 7 24 OSMUNDA 
Cystopteris 46 47 Osmunda 
DENNSTZDTIA 8 49 PELL#A 
Dicksonia 49 PHEGOPTERIS 
DrRYOPTERIS 8 39 Phyllites 
Dryopteris 38 PoLyPpopiIuM 
EQuiIsETUM 8 54 Polypodium 
FILix 8 46 PoLysTICHUM 
Lilix 15—20 22 28 38 40 51 PTERIDIUM 
Gisopteris 14 Pteris 
IsOETES 8 53 SELAGINELLA 
Lonchitis 29 35 Struthiopteris 
LORINSERIA 7 29 Trichomanes 
Lunaria 11 12 Woopsia 
Lycopodioides 63 Woodwardia 
857 
62 63 
6 14 
6 19 
8 52 
8 50 
57 59 62 
25 38—45 49 
8 51 
6 9 
& Ls 
If 13 50 51 
7 23 
6 20 
37 
6 18 
19-21 36-48 
7 38 
7 22 
22-24 
8 62 
50 
32 
8 “48 
28 29 
