The Botany of Iceland - 01.12.1942, Qupperneq 327

THE PTERIDOPHYTA AND SPERMATOPHYTA OF ICELAND
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Gentiana verna Linn.
Olavius, 1780, p. 201.—Mohr, 1786, p. 167.—Babington, 1871, p. 318.—Bennet,
1890, p. 80.
This species is recorded by Olavius, loc. cit., as found at Reykjalaug, and is
also entered in some of the older lists. It is possibly a mistake for G. nivalis. G. verna
is a most unlikely plant to be found in Iceland, and it should be excluded from the
Icelandic Flora.
335. Lomatogonium rotatum (L.) Fries, ex Nyman, Consp. Fl. Europ.
III (1881) p. 500.
Swertia rotata, K. & M., 1770, p. 206.—Pleurogyne rotata (L.) Grisebach,
Babington, 1871, p. 319.—Gronlund, Isl. Fl., 1881, p. 74.—Stefánsson, Fl.
Isl., ed. 1, 1901, p. 184.—Ibid., ed. 2, 1924, p. 208.—O. & Gr., 1934,
p. 112.
Flora Dan. tab. 343.
Icelandic: Blástjarna. English: Marsh Felwort.
Common in N., and rather frequent in the other parts in the lowland; from
the central parts only recorded from Arnardalur and Sauðárdalur (S.S., 1933).
f. minima with simple one-flowered stem, 1—2 cm high. Rather rare.
This species has a very remarkable geographical distribution outside Iceland,
being absent from the entire western part of Europe and only occurring in the
arctic parts of the Kola peninsula and eastward in northern and northeastern Asia
and in America, as also in W. Greenland. Distribution outside Icel., see M. L.
Fernald in Mem. Gray Herb. II, 1925, p. 339, and Hultén, Fl. of Kamtchatka, IV,
1930, p. 67.
Life-form: Th.
In swamps, on damp sandy and gravelly soil, especially near the sea-shore; on
grassy ground.
Flor. VII—VIII; fr. mat. (VIII).
Max. height: 18 cm; average: 9 cm.
Geogr. area: Am.: Newfoundland and Labrador, White Mts. of New Hampshire.
Alaska, southward to Colorado.—Greenl.: W. 60°—68°47'.—Eur.: Kola Penins.
and arctic Russia.—Asia: Siberia at the Oleneka R., and eastward; Altai, Shansi
and Amur prov., Kamchatka.
336. Menyanthes trifoliata Linn., Sp. pl. ed. I (1753) p. 145.
K. & M., 1770, p. 205.—Babington, 1771, p. 319,—Gronlund, Isl. Fl., 1881,
p. 74.—Stefánsson, Fl. ísl., ed. 1, 1901, p. 184.—Ibid., ed. 2, 1924, p. 209.—
O. & Gr., 1934, p. 112.
Flora Dan. tab. 541.
Icelandic: Horblaðka, Reiðingsgras (the rhizomes are called álftakólfur, mýrakólfur
or nautatág). Danish: Bukkeblad. English : Buck-Bean, Bog-Bean, Marsh-Trefoil.
Common in the lowlands in N., N.W. and S.W., otherwise rather rare. In the
central parts hitherto recorded from Hvítárvatn only (J.Gr., 1934). See fig. 145.
Life-form: HH (Helophyte).
In wet moors and swamps, in shallow water in lakes and ponds.