Fróðskaparrit - 01.01.1993, Side 87

SALIX IN THE FAROE ISLANDS AND THEIR AFFINITY WITH THE POPULATIONS IN ICELAND 9 J
Figure 1.
Distribution map over Salix lanata L. (open ring) and Salix
arctica Pall. or putative hybrids (fdled dots) in the Faroe
Islands. The map is based on specimens in the meseums in
Copenhagen and Tórshavn, the authors collections and
informations about origin of cultivated specimens in the
Faroe Islands.
lar stipules and leaf-margins and mature
leaves glabrate. Today that taxon is at the
most treated as subspecies (Elven, in prep.,
Hámet-Ahti et al., 1992) but the author
Skvortsov (1968: 447-452; 1971: 230),
who has investigated the species on a
worldwide scale, regards it only as a form.
Some of the Faroese specimens investigat-
ed have glanduliferous stipules but the leaf-
margins are without any glandules and not
glabrate. Plants with glanduliferous stip-
ules are not uncommon in Iceland and such
specimens in the herbarium in Reykjavík
were by Floderus determined as hybrids,
Salix glandulifera x lanata. I am of the
opinion that glanduliferous stipules are
only to be regarded as a natural variation
within the species Salix lanata and it is not
possible to find any characteristics within
the Faroese population that distinguish
them from Salix lanata in Iceland or Scan-
dinavia.
Papers about the flora of the Faroe Is-
lanđs in the beginning of this century (Os-
tenfeld, 1901; Ostenfeld and Grontved,
1934) do not include Salix lanata and Ras-
mussen (1936; 1952) mentions a statement
by Trevelyan (1835) but consider it as
doubtful that this species is found in the is-
lands, and all the specimens in the museum