The Botany of Iceland - 01.12.1942, Blaðsíða 113

THE PTERIDOPHYTA AND SPERMATOPHYTA OF ICELAND
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Life-form: G. (Rhizome Geophyte).
In ravines and shady, damp places under rocks, etc., in birch scrub, in crevices in
the lava, in urðs, on herb-slopes.
Max. height: 42 cm; average: 23 cm.
Geogr. area: N. Am.: Arctic and temperate parts.—Greenl.: W. 60°—65°40'. E.
60°—66°18'.—Eur. : Fær.; E.S.I.; throughout Europe ; Caucasus.—Northern Asia
to Himalaya; Asia Minor, Japan.
Dryoþteris Thelyþteris (L.) Gray.
Acrostichum Thelyþteris, K. & M., 1770, p. 211.—Lastrea Thelyþteris Presl., Ba-
bington, 1871, p. 347.
König & Miiller record this species, loc. cit., and all the older lists include it,
cp. Babington, loc. cit., only Vahl has doubts about its being a native in Icel. No
specimens are in evidence, and it is very doubtful whether it has been found in
Iceland.
28. Polypodium vulgare L., Sp. pl. ed. I (1753) p. 1085.
Baring-Gould, 1863, p. 437.—Babington, 1871, p. 347.—Gronlund, Isl. FI.,
1881, p. 139,—Stefánsson, Fl. ísl., ed. 1, 1901, p. 7,—Ibid., ed. 2, 1924, p. 7,—
O. & Gr., 1934, p. 9.
Flora Dan. tab. 1060.
Icelandic: Köldugras. Danish : Almindelig Engelsod.—English: Common Polypody,
Wall Fern.
P. vulgare occurs in most parts, except in the central highland whence it has not
yet been recorded. The sketch map fig. 28 will give a picture of its distribution in