The Botany of Iceland - 01.12.1942, Síða 194

192
JOHS. GRONTVED
jluncus squarrosus Linn.
Mohr, 1786, p. 172.—Babington, 1871, p. 332.
Recorded by some of the older authors. No specimens are in evidence, and it
is rather unlikely that it should have been found in Iceland; it has, however, been
found in the southernmost parts of Greenland.
143. Juncus trifidus Linn., Sp. pl. ed. I (1753) p. 326.
K. & M., 1770, p. 206.—Babington, 1871, p. 332,—Gronlund, Isl. Fl., 1881,
p. 102.—Stefánsson, Fl. Isl., ed. 1, 1901, p. 23.—Ibid., 'ed. 2, 1924, p. 26.—
C.H.O., Fl. arct., 1902, p. 26,—O. & Gr., 1934, p. 43.
Flora Dan. tab. 107 and tab. 1691.
Icelandic: Móasef. Danish: Treklovet Siv. English: Trifid Rush, Highland Rush.
Common throughout Icel., in the lowland as well as the highland.—Often in
company with Kobresia Bellardi, forming the so-called Kobresia-mó, see e.g. H.J.,
1895b, p. 61.
Life-form: H.
In Calluna heaths, fell-field, grass mó; on rock-ledges, in rock-fissures, Grimmia-
heath, lava-fields, etc.
Flor. VI—VII; fr. mat. VII—VIII.
Max. height: 32 cm; average: 18 cm.
Geogr. area: Am.: Northeastern Am., southward to New York.—Greenl.: W. 60°—
71°33'. E. 60°—70°27'.—Eur.: Fær.; S.; northern Scandinavia, Finland and Russia,
Central European mts., Caucasus.—Asia: Ural, Altai, and Baikal mts.
144. Juncus triglumis Linn., Sp. pl. ed. I (1753) p. 328.
K. & M., 1770, p. 206.—Babington, 1871, p. 332.—Gronlund, Isl. Fl., 1881,
p. 102.—Stefánsson, Fl. ísl., ed. 1, 1901, p. 23.—Ibid., ed. 2, 1924, p. 26.—
C.H.O., Fl. arct., 1902, p. 25,—O. & Gr., 1934, p. 43.
Flora Dan. tab. 132.
Icelandic: Blómsef. Danish : Treblomstret Siv. English: Three-flowered Rush.
Common in all parts, in the lowland as well as the central highland ; characteristic
species of the flag-vegetation.
Life-form: H.
In moist gravelly and clayey soil; in dý-land and mó, meadows, borders of
lakes and rivers.
Flor. VI—VII; fr. mat. VII—VIII.
Max. height: 20 cm ; average: 9 cm.
Geogr. area: (incl. J. albescens (Lge.) Fern.) Am.: Northern N. Am. (J. albescens).
—Greenl.: (p. p. J. albescens) W. 60°—78°18'. E. 60°—77°40'.—Eur.: Fær.; E.S.;
northern Scandinavia; Kola; Spitsbergen; Novaya Zemlya, Central Eur. mts.;
Caucasus.—Asia : Siberia, Kashmir, Altai, N. China; Honshu.
145. Luzula arcuata (Wg.) Swartz, Summa syst. veg. Scand. (1814)
p. 13.
L. arcuata Hook., Carroll, 1867, p. 108.—Babington, 1871, p. 333.—L. arcuata
Wg. and L. confusa Lindeb., Gronlund, Isl. FL, 1881, p. 98.—L. arcuata