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IX. Notholæna Fendkri, Kunze.
Notholæna dealbata, Kunze.
X. Aspidium Nevadense, D. C. Eaton.
X I . Pellæa densa, Plooker.
Pellæa pulchella. Fée.
X I I. Cheilanthes viscida, Davenport.
Cheilanthes Clevelandii, D. C. Eaton.
X I I I . Aspidium unitum, var. glabrum, Mettenius.
X IV . Aneimia Mexicana, Klotzsch.
Aneimia adiantifolia, Swartz.
X V . Asplénium Ruta-muraria, Linnæus.
Asplénium septentrionale, Hoffmann.
X V I. Polypodium aureum, Linnæus.
X V II. Botrychium simplex, Hitchcock.
Botrychium inatricariæfolium. Al. Braun.
X V I I I . Adiantum pedatum, Linnæus.
X IX . Blechnum serrulatum, Richard.
X X . Botrychium ternatum, Swartz.
X X I . Phegopteris Dryopteris, Fée.
X X I I . Aspidium Lonchitis, Swartz.
Woodwardia angustifolia, Smith.
P l a t e X X I I I . Phegopteris alpestris, Mettenius.
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Aspidium fragrans, Swartz.
X X IV . Trichomanes radicans, Swartz.
Trichomanes Petersii, Gray.
Schizæa pusilla, Pursh.
X X V . Aspidium munitum, Kauifuss.
X X V I . Polypodium Scouleri, Hooker & Greville.
Polypodium incanum, Swartz.
Polypodium falcatum, Kellogg.
P l a t e X X V I I , Pellæa andromedæfolia. Fée.
Pellæa ilexuosa. Link.
P l a t e X X V I I I . Osmunda regalis, Linnæus.
P l a t e X X IX . Osmunda Claytoniana, Linnæus.
Osmunda cinnamomea, Linnæus.
P l a t e X X X . Aspidium Thelypteris, Swartz.
P l a t e X X X I . Polypodium vulgare, Linnæus.
Polypodium Californicum, Kaulfuss.
P l a t e X X X I I . Scolopendrium vulgare, Smith.
Lomaria Spicant, Desvaux.
P l a t e X X X I I I . Botrychium Virginianum, Swartz.
P l a t e X X X IV . Aspidium acrostichoides, Swartz,