The Botany of Iceland - 01.12.1942, Side 201

THE PTERIDOPHYTA AND SPERMATOPHYTA OF ICELAND
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Life-form : G. (Root-tuber Geophyte).
On moist and on dry soil in moors and heaths, in open scrub, grassy slopes, fell-field.
Flor. VI—VII (VIII) ; fr. mat. VIII.
Max. height: 29 cm ; average: 14 cm.
Geogr. area: N. Am. from Newfoundland to Alaska, southward to Pennsylvania,
Nebraska, Utah, Oregon.—Greenl.: W. 60°—69°33'. E. 60°—65°38'.—Asia:
Southern part of Kamchatka peninsula, Kuriles, Hokkaido and Honshu.
154. Leucorchis albidus (L.) E. Mey ex Schur, Enum. Pl. Trans.
(1866) p. 645.
Satyrium albidum, K. & M., 1770, p. 210.—Peristylis albida (Lindi.), Baring-
Gould, 1863, p. 434.—Habenaria albida R.Br., Babington, 1871, p. 330.—
Gronlund, Isl. Fl., 1881, p. 95.—Stefánsson, Fl. ísl., ed. 1, 1901, p. 68.—Ibid.,
ed. 2, 1924, p. 77,—C.H.O., Fl. arct., 1902, p. 38.—O. & Gr., 1934, p. 49.
Flora Dan. tab. 115 (Satyrium albidum L.).
Icelandic: Hjónagras. Danish : Hvid Traadspore. English: White Satyrion.
According to Fernald (Rhodora, 1929, p. 1502, and map 33) the Icelandic plant
should be referred to the var. straminea (Fern.) Morris, Fern. in Rhodora, Vol. 28,
1926, p. 174. This variety occurs on the Færoes, in Iceland, Greenland and on New-
foundland, while the main species occurs in other parts of Europe. The difference
between the two varieties does not on the whole seem to be of great significance.
Common throughout the lowland. In the central highland found in Fróðárdalur,
at Karlsdráttur on Hvítárvatn, and on Arnarfell hið mikla at Hofsjökull (J.Gr.,
1934).
Life-form : G. (Root-tuber Geophyte).
On heaths and moors; grassy slopes; copses.
Flor. VI—VII ; fr. mat. VIII.
Max. height: 34 cm; average : 18 cm.
Geogr. area: Am.: Newfoundland, St. Lawrence.—Greenl.: W. 60°—69°32'. E.
60°—66°8'.—Eur. : Fær.; E.S.I.; northern and western parts of Eur. ; Ural.—Asia:
Northwestern Siberia, Asia Minor.
155. Listera cordata (L.) R.Br., in Aiton, Hort. Kew, ed. 2, V (1813)
p. 201.
Babington, 1871, p. 331.—Gronlund, Isl. Fl., 1881, p. 96.—Stefánsson, Fl. Isl.,
ed. 1, 1901, p. 68.—-Ibid., ed. 2, 1924, p. 77.—C.H.O., Fl. arct., 1902, p. 37,—
O. & Gr., 1934, p. 48.
Flora Dan. tab. 1278.
Icelandic: Hjartablaðka. Danish: Hjertebladet Fliglæbe. English: Small Tway-
blade, Hcart-leaved Twayblade.
Found in all parts, except in the central plateau. Rather rare in S., otherwise
frequent.
Life-form : G. (Rhizome Geophyte).
ln grassy slopes, heath moors, Calluna heaths, birch-scrub, lava-fields, screes.
Flor. VII—VIII ; fr. mat. VIII.
Max. hcight: 17 cm ; avcrage : 10 cm.