The Botany of Iceland - 01.12.1942, Blaðsíða 205

THE PTERIDOPHYTA AND SPERMATOPHYTA OF ICELAND
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Life-form: Ph.
In moors, heaths, copses, fell-field ; in rock-fissures, screes, etc.
Flor. VI—VII; fr. mat. VII—VIII.
Usually a low shrub, but may attain a height of up to 1 m.
Geogr. area: (Coll. species) Am.: From Labrador to Alaska and the arctic archi-
pelago.—Greenl.: W. 60°—76°?. E. 60°—c. 70°.—Eur.: Fær.; northern and central
Scandinavia, Novaya Zemlya, northern Russia, Ural, Alps.—Asia: Along the north
coast to Kamchatka. Altai.
Salix glauca X S. herbacea.
Helgi Jónsson, 1896, p. 336.
H.R. contains two different samples of this presumed hybrid, one is from Bæjar-
fjall in Hrútafjörður, N.W. (leg. Stefánsson, 1893), the other from Geldingafell,
N.W. (leg. Stefánsson, 1893). Helgi Jónsson, loc. cit., also records this hybrid from
Þingmúli, E.
Salix glauca X S. lanata.
H. Jónsson, 1896, p. 336.—Stefánsson, Fl. ísl., ed. 1, 1901, p. 70.—Ibid., ed. 2,
1924, p. 80.
H.R. has two sheets with this (presumed) hybrid from Hvanndalir, N. Icel.
(leg. Stefánsson, 1890). Helgi Jónsson, loc. cit., records a find from Dvergasteinn,
E., collected by himself and seen by Lundström who remarks: “verisimillime S.
glauca X lanata!”. In Stefánsson, 1924, loc. cit., it is also recorded from Þorvalds-
dalur, N. (leg. Ó.D.). In addition H. Jónsson (in mscr.) records the hybrid from
Hestahraun, N. (Ieg. Ó.D.), and from Trostansfjörður, N.W. (leg. H.J.).
Salix glauca X S. phylicifolia.
H. Jónsson, 1896, p. 336.—S. Wichurae Anderss., Gronlund, Isl. Fl., 1881, p. 91.—
S. islandica Gandoger, 1900, p. 346.—S. glauca X S. phylicifol., Stefánsson, Fl. ísl.,
ed. 1, 1901, p. 70.—Ibid., ed. 2, 1934, p. 80.—O. & Gr., 1934, p. 51.
From the amount of material of this hybrid kept in H.H. and H.R. it would
seem that it is fairly frequent throughout Iceland, even common. In many cases the
specimens have well developed capsules with ripe seeds and thus seem to be fully
fertile, cp. also Bj. Floderus: Om Gronlands Salices. Medd. om Gronland, LXIII,
1923, p. 122.
161. Salix herbacea Linn., Sp. pl. ed. I (1753) p. 1018.
K. & M., 1770, p. 211.—Babington, 1871, p. 329.—Gronlund, Isl. Fl., 1881,
p. 89.—Stefánsson, Fl. ísl., ed. 1, 1901, p. 71.—Ibid., ed. 2, 1904, p. 81.—
O. & Gr., 1934, p. 52.
Flora Dan. tab. 117.
Icelandic: Grasvíðir, Smjörlauf, Geldingalauf. Danish: Dværgpil. English: Least
Willow, Dwarf Willow.
Common in all parts, in the lowland as well as the central highland. A charac-
tenstic component in the community of the snow-patches in the central highland,
and common in various other formations.
The var. fruticosa Fr. with larger leaves, and otherwise of a more robust stature,
is rather frequent.