The Botany of Iceland - 01.12.1942, Page 305

THE PTERIDOPHYTA AND SPERMATOPHYTA OF ICELAND
303
303. Myriophyllum spicatum Linn., Sp. pl. ed. I (1753) p. 992.
K. & M., 1770, p. 210.—Babington, 1871, p. 306.—Gronlund, Isl. Fl., 1881,
p. 27.—Stefánsson, Fl. Isl., ed. 1, 1901, p. 149.—Ibid., ed. 2, 1924, p. 168.—-
O. & Gr., 1934, p. 99.
Flora Dan. tab. 681.
Icelandic: Vatnamari. Danish : Aks-Tusindblad. English : Spiked Water-Milfoil.
While M. alternijlorum is common in Iceland, it seems that M. sþicatum is rare.
It is frequent in the lake Mývatn and its environs, and otherwise only found in a
very few places, see fig. 129.
Life-form : HH. (Hydrophyte).
In fairly large lakes.
Flor. VII—VIII; fr. mat. (?).
Max. length of shoots: 100 cm; average: 70 cm.
Geogr. area: Am.: From Newfoundland to Alaska, southward to southern Cali-
fornia ; Florida, Texas.—Greenl.: W. 66°55'—70°30'.—Eur.: E.S.I.; throughout
Eur., from northern Scandinavia and Russia.—Asia: Northern, western and central
Asia, China, Japan, Formosa, Kamchatka.—N. and S. Africa.
304. Myriophyllum verticillatum Linn., Sp. pl. ed. I (1753) p. 992.
K. & M., 1770, p. 210.—Babington, 1871, p. 306.—Gronlund, 1881, p. 27.—
Stefánsson, Fl. ísl., ed. 1, 1901, p. 149.—Ibid., ed. 2, 1924, p. 169.—Idem,
1919, p. 39.—O. & Gr., 1934, p. 99.
Flora Dan. tab. 1046.
Icelandic: Tjarnamari. Danish : Krans-Tusindblad. English: Whorled Water-Milfoil.
This species has been recorded as found at Hafnarfjörður (Solander, in Ba-
bington, loc. cit.). Ól. Davíðsson records it from Úlfsbær in Bárðardalur, N. (cp. Ste-
fánsson, 1924, loc. cit.). See fig. 129.—As far as I know, there has never been any
specimen to corroborate the records, and there may be some doubt about the correct
determination of the specimens in question.
Life-form : HH. (Hydrophyte).
In lakes.
Geogr. area: Am. : Canadian lake-region, Gaspé County, Quebec, New Jersey, Brit.
Columbia, Minnesota, Utah.—Eur.: E.S.; throughout Europe from northern Scan-
dinavia.—Asia: Temperate Asia, eastward to Japan. Asia Minor, Persia, Kashmir.
Hippuridaceae.
305. Hippuris vulgaris Linn., Sp. pl. ed. I (1753) p. 4.
K. & M., 1770, p. 203.—Babington, 1871, p. 306.—Gronlund, Isl. Fl., 1881,
p. 26.—Stefánsson, Fl. tsl., ed. 1, 1901, p. 150,—Ibid., ed. 2, 1924, p. 169.—
O. & Gr., 1934, p. 100.
Flora Dan. tab. 87.
Icelandic : Lófótur. Danish : Hestehale. English : Mare’s-tail.
Common in all parts of the lowland ; from the central highland recorded only
from some few localities: Hvítárvatn and Múlaver (J.Gr., 1934).