The Botany of Iceland - 01.12.1942, Blaðsíða 222

220
JOHS. GRONTVED
Flor. VI—VII; fr. mat. VII—VIII.
Max. height: 38 cm ; average: 14 cm.
Geogr. area: (var. alpestre Lindbl.) N. Am. arctic parts.—Greenl.: W. 59°52'—
61°15'.—Eur.: Fær.; S.; Scandinavia, Roumania. Caucasus,-—Asia : Kamchatka.
184. Cerastium Cerastoides Britt., Mem. Torr. Bot. Club V (1894)
p. 150.
Stellaria cerastoides, K. & M., 1770, p. 207.—-C. trigynum Vill., Babington,
1871, p. 299.—Gronlund, Isl. Fl., 1881, p. 37.—Stefánsson, Fl. Isl., ed. 1,
1901, p. 85.—Ibid., ed. 2, 1924, p. 96,—O. & Gr., 1934, p. 59.
Flora Dan. tab. 92.
Icelandic: Lækjafræhyrna. Danish: Trehunnet Honsetarm. English: Mountain
Mouse-ear Chickweed.
Common in all parts, in the lowland as well as the central highland.
Life-form: Ch.
On wet, sandy and gravelly soil, along brooks, on the borders of lakes, at springs,
in moist moss carpets.
Flor. VI—VII; fr. mat. VII—VIII.
Max. length of shoots: 20 cm; average: 10 cm.
Geogr. area: N. Am.: Arctic parts; Gaspé, Quebec.—Greenl.: W. 60°—71°45'.
E. 60°—73° 15'.—Eur. : Fær.; S. ; northern Scandinavia and Russia, Novaya Zemlya,
Jan Mayen, Pyrenees, Alps, Karpathians; Caucasus.—Asia: Siberia, Altai, Himalaya,
Asia Minor.—Africa : Morocco.
Cerastium latijolium Linn.
Zoéga, 1772, p. 7.—Hooker, in Mackenzie, 1811, p. 425.—Babington, 1871, p. 299.
Recordcd by some of the older authors, evidently confused with C. Edmondstonii
185. Cerastium Edmondstonii (Wats.) Murb.
& Ostcnfeld, Bot. Notiser, 1898, p. 246.
C. arcticum Lge., Gronlund, Isl. Fl., 1881, p. 36.
C. Edmondstonii (Wats.) Murb. & Ostf., Ste-
fánsson, Fl. Isl., ed. 1, 1901, p. 84.—C. nigre-
scens Edmondst., Ibid., cd. 2, 1924, p. 95.—C.
nigrescens Syme, O. & Gr., 1934, p. 59.
Flora Dan. tab. 2693, fig. 4 (C. arcticum Lge.).
lcelandic : Kirtilfræhyrna. Danish : Norsk Honsetarm.
English : Arctic Mouse-ear Chickweed.
C. Edmondstonii has hitherto been regarded as
rare ill Iccland, it is, however, very likcly that at least
in thc eastern parts it is rather frequent. Owing to
thc difficulty in distinguishing it from forms of C.
alpinum it has, no doubt, often been mistaken for this
latter species. When ripe, or at least nearly fully
developed, capsules are prcsent, there can be no dif-
ficulty in determining it correctly. See fig. 81.
(Wats.) Murb. & Ostf.
Fig. 81. Ripc capsulcs of:
a. Cerastiurn alpinum, b. C.
Edmondstonii. 1:1.