The Botany of Iceland - 01.12.1942, Blaðsíða 220

218
JOHS. GRONTVED
Lifc-form : Th.
Around inhabited places, in home-fields, on gravelly flats ; on moderately sandy and
gravelly soil, also sometimes on clayey soil.
Flor. VII—VIII ; fr. mat. VII—VIII.
Max. height: 30 cm ; average : 10 cm.
Geogr. area: N. Am.: (naturalized from Eur.) Eastern Canada, southward to S.
Carolina ; California.—S. Am.—Eur.: Fær.; E.S.I.; throughout Europe.—Asia,-—
N. Afr., Macaronesia.—Australia.
Alsinoideae.
181. Arenaria norvegica Gunn., Fl. Norveg. II (1772) p. 1100.
A. ciliata, K. & M., 1770, p. 207.—A. norvegica Gunn., and A. ciliata L.,
Babington, 1871, p. 298.—A. ciliata L. /3. humijusa (Wg.), Gronlund, Isl.
Fl., 1881, p. 34.—Stefánsson, Fl. tsl., ed. 1, 1901, p. 86.—Ibid., ed. 2, 1924,
p. 97.—A. norvegica Gunn., O. & Gr., 1934, p. 62.—Steindórsson, 1937c,
p. 96.
Flora Dan. tab. 1269.
Icelandic: Skeggsandi. Danish: Sandvaaner. English: Ciliate Sandwort.
This species is distinguished from the typical A. ciliata by its stems and flower-
stalks being less hairy; the leaves are usually broadly ovate, very sparingly ciliate,
may even be without ciliae in the margin; the petioles usually with some few
ciliae. The sepals are scarcely nerved, and the petals not twice as long as the sepals.
—Cp. also R. Nordhagen, 1935, p. 41—45.
Common throughout Iceland, in the lowland as well as in the highland.
Life-form : Ch.
On gravelly and sandy soil, in lava-fields, fell-field, etc.
Flor. V—VII; fr. mat. VI—VIII.
Max. height: 12 cm; average: 6 cm.
Geogr. area: (A. norvegica s. str.).—Eur.: S.; Shetland Isl.; Scandinavia from about
60° N. lat. to about 71° N. lat. Finland.
Arenaria serþyllifolia Linn.
K. & M., 1770, p. 207.—Babington, 1871, p. 298.
Recorded by K. & M., loc. cit. ; Babington mentions one locality (Hafnarfjörður,
W.) after Solander. It ought to be excluded from the Icelandic flora.
182. Cerastium alpinum Linn., Sp. pl. ed. I (1753) p. 438.
K. & M., 1770, p. 207,—Babington, 1871, p. 299.—Gronlund, Isl. Fl., 1881,
p. 36.—Stefánsson, Fl. tsl., ed. 1, 1901, p. 83,—Ibid., ed. 2, 1924, p. 94.—
O. & Gr., 1934, p. 60.
Flora Dan. tab. 6.
Icelandic: Músareyra. Danish: Bjerg-Honsetarm. English: Alpine Mouse-ear,
Chickweed.
An exceedingly variable species, both in regard to stature and the form of the
lcaves, as also in degree and nature of hairiness: The form lanatum (Lam.), (C.
lanuginosum Willd.) is common, and f. glabrum (Rctz.) too is fairly frequent.
In plants from Vallanes, E., investigated by H. Jónsson (1896, p. 339), it was