254 ON WOODSIA.
Acrostichum ilvense. Linn. Sp. PL ed. 2, p. 1528. Nephrodium lanosam. Michauw, Amer. 2, p. 198. Habitat in rupibus Europoe et America borealis. (v. v.)
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2. hyper borea. W. frondibns pinnatis, pinnis triangu- laribus oblongisve inciso-pinnatifidis : lobis integerrimis paucifloris : antico baseos productiore. Tab. 38 (XI).
Poly podium hyperboreum. Swart z, Synop. FiL 39. Willden. Sp. PL &,p. 197. Eng. BoL 2023.
Polypodium arvonicum. Smith, Fl. Brit. 3, p. 1115.*
Polypodium ilvense. Withering, Arrang. ed. 3, t. 3, p. 774.
Acrostichum hyperboreum. Liljeblad in Act. Stock- holm. 1793,/?. 201, t. 8*.
Acrostichum alpinum. Bolton, Ml. Brit. 76, t. 42.
Ceterach alpinum. Lamarck et Decandolle, FL Fran. 2, p. 567.
Habitat in Europse alpibus (v. v.) it.
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