The Botany of Iceland - 01.12.1942, Síða 295
THE PTERIDOPHYTA AND SPERMATOPHYTA OF ICELAND
293
Icelandic: Krækilyng, Krækiberjalyng. Danish : Rævling, Krækkebærlyng. English:
Crowberry.
Common in all parts, in the lowland as well as in the central highland.
Almost as common as the usual dioecious form is var. hermaþhroditum Lange,
emend. O. Hagerup (cp. Lange in Consp. fl. groenl., 1880, p. 18, and O. Hagerup
in Dansk Botan. Arkiv, Vol. 5, no. 2, 1927).
Material collected by myself in 4 different places (in all 39 specimens) showed
the following result:
Collection no. 351
Emþetrum nigrum ................. 3
» » 9 ............ ^
„ hermaþhr. (cfj) ..........
352 353 354
2 0 7 12
3 1 1 11
3 11 2 16
39
No. 351 : Hallormsstaður, E., 4.VIII.1935.
„ 352: Moor at Jökulsá, near Laugafell, E., 23.VII.1935.
„ 353: Eyjabakkar, E., 29.VII.1935.
„ 354: Skútustaðir at Mývatn, N., in moor, 9.VII.1935.
Of the herbarium specimens in H.H. 14 were bisexual, out of a number of 19
which were definitely determinable as to sex.
As to the distribution of E. nigrum in America, see M. L. Fernald in Mem. of
the Gray Herbarium II, 1925, p. 248. For Scandinavia, see Th. Arwidsson in Botan.
Notiser, 1935, p. 181 et seq.
Life-form: Ch.
On heather moors and heaths, hill-slopes, in low scrub, etc.
Flor. IV—V ; fr. mat. VI—VIII.
Max. length of shoot-system up to 100 cm.
Geogr. area: (coll. spec.) Am.: Boreal parts, southward to the Alleghany mts.;
Ellesmere Land and Alaska.—Greenl.: W. 60°—78°7\ E. 60°—76°49'.—Eur.: Fær.;
E.S.I. ; throughout northern and central Eur. ; Spitsbergen.—Asia: Northern Siberia,
Ural, Altai, Kamchatka, Korea, Japan.
Rhamnaceae.
Rhamnus cathartica Linn.
Babington, 1871, p. 300.
Quoted by Babington, loc. cit., from Solander, who is said to have seen it in an
Icelandic herbarium.
This is certainly, as Babington remarks, a mistake, and this species should be
excluded from the Icelandic Flora.
Malvaceae.
Malva þusilla Sm. et Sow.
M. borealis Wallm., Rostrup, 1887, p. 175.—Bennet, 1890, p. 79.—Stcfánsson, Fl.
fsl., ed. 1, 1901, p. 117.—Ibid., cd. 2, 1924, p. 132,—O. & Gr., 1934, p. 79.
Only found once : at Blönduós, N. (A.F.). It is not a native of Iceland.
Guttiferae.
Hyþericum þerforatum Linn.
Olavius, 1780, I, p. 36.—Glicmann, 1824, p. 145.—Babington, 1871, p. 300.
This species is mentioned by Olavius, loc. cit., from Lonafiord (Lónsfjörður) in
N. W.—Glicmann and Babington, loc. cit., have inserted it in their lists. It should
certainly be cxcluded from the Icelandic Flora.