The Botany of Iceland - 01.12.1942, Síða 189

THE PTERIDOPHYTA AND SPERMATOPHYTA OF ICELAND
187
Fig. 69. Juncus articulatus L.
Geogr. area: Am. : Atlantic N. Am. British Columbia to Oregon. Newfoundland
to New Jersey; Michigan.—Eur.: Fær.; E.S.I.; throughout Eur., except in the
arctic zone. Caucasus.—Asia: Throughout Siberia to Syria, Persia, Afghanistan,
Kashmir, Lahore, Yunnan.—Africa: North Afr., Madeira, Azores; South Africa
(introduced?).—Austr.: New Zealand (introduced?).
136. Juncus balticus Willd., Berlin Mag. II (1809) p. 298.
Babington, 1848, p. 19.—Ibid., 1871, p. 331.—Gronlund, Isl. Fl., 1881,
p. 100.—Stefánsson, Fl. ísl., ed. 1, 1901, p. 22.—Ibid., ed. 2, 1924, p. 25.—
C.H.O., Fl. arct., 1902, p. 23,—O. & Gr., 1934, p. 42.
Flora Dan. tab. 2770.
Icelandic: Hrossanál. Danish : Klit-Siv. English : Baltic Rush.
Common throughout the lowland; rare in the central highland, seems to be
replaced there by J. arcticus. Where growing abundantly in the lowland, it is used
for hay.
In many cases it may be very difficult to distinguish between the Icclandic
specimens of J. balticus and J. arcticus; altogether there seem to be transitional forms
between the two spccies ; for hybrids also occur, see below. A rather variable species.
Life-form: G. (Rhizome Geophyte).
On moist sandy soil, on heaths, grass moors, river-banks.
Flor. VI—VII; fr. mat. VII—VIII (IX).
Max. height: 45 cm ; avcrage : 25 cm.
Geogr. arca: Am.: Labrador to Alaska, southward to California, Mexico, Pennsyl-
vania. S.^Am.: Chile, Patagonia.—Austr. : New Caledonia.—Greenl. : W. (?) 60°
64 45 . Eur.: Fær.; S. ; Scandinavia, Finland, Baltic States, Russia, North
coast of Germany; Pyrenees.—Asia: N. Kamchatka, Japan.