The Botany of Iceland - 01.12.1942, Síða 212

210
JOHS. GRONTVED
Polygonaceae.
168. Koenigia islandica Linn., Mant. (1767) p. 35.
K. arctica, K. & M., 1770, p. 205.—K. islandica L., Babington, 1871, p. 325.—
Gronlund, Isl. Fl., 181, p. 87.—Stefánsson, Fl. Isl., ed. 1, 1901, p. 79.—Ibid.,
ed. 2, 1924, p. 89,—O. & Gr., 1934, p. 55.
Flora Dan. tab. 418.
Icelandic: Naflagras. Danish : Islandsk Königsurt.
Common in all parts, in the central highland also. Although this species is a
typical arctic plant and is found in Iceland high up in the mountains, for instance
on the Kerlingarfjöll massive at 1000 m s. m., it is also common in the lowland.
Even on the banks of brooks with warm water from the hot springs I have observed
it, in places where the temperature of the running water was about 70° C. (Reykir
at Álafoss, northeast of Reykjavík, 1934).
Life-form: Th.
On moist, clayey soil, along brooks, on the borders of small lakes, often abundantly
in mosses lining small streams; home-fields, in moist depressions in fell-field.
Flor. VI—VII; fr. mat. VII—VIII.
Max. height: 10 cm ; average : 4 cm.
Geogr. area: Am.: Along the arctic coast from Baffin Land and Labrador to Alaska.
S. Am.: Tierra del Fuego.—Greenl.: W. 60°—76°. E. 60°—77°37'.—Eur.: Fær.;
central Scandinavia, Samoyed Land, Jan Mayen, Spitsbergen, Novaya Zemlya.—-
Asia: Northern Siberia, southward to Yakutsk; Tibet, Kashmir, northern Kuriles.
169. Oxyria digyna (L.) Hill, Hort. Kew. (1769) p. 158.
Rumex digynus, K. & M., 1770, p. 206.—O. reniformis Hook, Babington,
1871, p. 325.—O. digyna Campd., Gronlund, Isl. Fl., 1881, p. 86.—O. digyna
(L.) Hill, Stefánsson, Fl. ísl., ed. 1, 1901, p. 81.—Ibid., ed. 2, 1924, p. 91.—
O. & Gr., 1934, p. 56.
Flora Dan. tab. 14.
Icelandic: Ólafssúra, Súrkál, Hrútablaðka, Fjallakál. Danish: Fjældsyre. English:
Mountain-Sorrel.
Common in all parts, in the lowland as well as the central highland.
Life-form : H.
In rock-crevices, on damp rock-ledges, on gravelly flats in the hills, along brooks,
in shady places, in dry river-beds, etc.
Flor. VI—VII; fr. mat. VII—VIII.
Max. height: 40 cm; average: 16 cm.
Geogr. area: Am.: Labrador to Alaska, southward to California, New Mexico and
Alberta.—Greenl.: W. 60°—83°. E. 60°—79°30'.—Eur.: Fær.; E.S.I.; central
Scandinavia, Kola; alpine regions of central and S. Europe; Ural, Jan Mayen,
Spitsbergen, Novaya Zemlya.—Asia : Arctic regions. Pamir, Himalaya, Altai, Asia
Minor, Japan.
170. Polygonum amphibium Linn., Sp. pl. ed. I (1753) p. 361.
K. & M., 1770, p. 207.—Babington, 1871, p. 325.—Helgi Jónsson, 1899,
p. 191.—Stefánsson, Fl. ísl., ed. 1, 1901, p. 80.—Ibid., ed. 2, 1924, p. 90.—
O. & Gr., 1934, p. 54.
Flora Dan. tab. 282.