The Botany of Iceland - 01.12.1942, Blaðsíða 115
THE PTERIDOPHYTA AND SPERMATOPHYTA OF ICELAND
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31. Woodsia ilvensis (L.) R.Br., Transactions Linn. Soc. XI (1815)
p. 173.
Acrostichum Ilvense, K. & M., 1770, p. 211.—W. ilvensis R.Br., Babington,
1871, p. 347.—Gronlund, Isl. FL, 1881, p. 142.—Stefánsson, Fl. ísl., ed. 1,
Fig. 29. Woodsia ilvensis (L.) Tt.Br.—Double-rings: W. glabella R.Br.
1901, p. 4.—Ibid., ed. 2, 1924, p. 4,—C.H.O, Fl. arct, 1902, p. 7,—O.
& Gr, 1934, p. 6.
Flora Dan. tab. 391 ; var. hyperborea Fl. Dan. tab. 2185 and tab. 2921 fig. 2.
Icelandic: Liðfætla. Danish : Laadden Woodsia. English : Rusty Woodsia.
The main form a. rufidula (Mich.)Koch is found in nearly all parts, except in
the central tracts but it is not common; it seems in fact mainly to be restricted to
the coastal regions, more rarely occurring in places far inland. See fig. 29.
var. alpina (Bolt.) Aschers & Graebner, Syn. I, p. 46 (W. alpina Newm.) W.
hyperborea (R.Br.). Acrostichum alpinum Bolton : Fronds linear-lanceolate or oblong,
pinnate, glabrous or slightly hairy only beneath; pinnae triangular pinnatifid or
lobed, lobes 3—7 very blunt, nearly entire. Found in several places in S.W, also
occurring in N. and S.
Life-form: H.
In fell-field, rock-crevices and screes, in moss-heaths.
Max. height: 16 cm; average: 8 cm.
Geogr. area: N. Am. southward to New England, in the mts. to N. Carolina, etc,—
Greenl.: W. 60°—74°. E. 60°—71°5'.—Eur.: E.S.; northern and central Eur,
Alps, Caucasus.—Asia: Northern Asia, southward to Asia Minor, Manchuria, Kam-
chatka.
The Botany oí Iceland. Vol. IV. Part I.
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