Rit (Vísindafélag Íslendinga) - 01.06.1975, Blaðsíða 111

This summary, therefore, does not provide much information as
to the acidity of the Scirpus mire; it does, however, give some indi-
cation that the mire is eutroph-mesotrophic. Scirpus cæspitosus
sociations are common in mountain regions in Scandinavia. I be-
lieve the Icelandic Scirpus mire may be classified under Scirpetmn
cæspitosi-Trichophori subarcticum (Nordhagen 1943 p. 473 ff) al-
though the sociations are not completely identical since some of
the Norwegian character species do not occur in this country.
Furthermore, as studies of moss are not available this cannot be
fully determined. The analyses by Resvoll-Holmsen (1920 pp. 126
and 129) from the Jötunheimen region concur closely with some
of my analyses, particularly XIV. 9 which closely resembles a
Carex panicea-rich Scirpus mire. The same applies to some of
Kalela’s analyses from Fischerhalbinsel, particularly with regard
to Scirpus cæspitosa Buntmoos Braunmoor (1939 p. 424 Tab. 89)
Kalela’s description of the Scirpus mire closely agrees with what
has been said here regarding mound-formation which is insignifi-
cant. On the other hand the Artenreiche Scirpus austriacus socia-
tion ( l.c. pp. 95—101) appears to be more distantly related. See
also Söyrinki 1938 p. 48 and Smith 1920 p. 81 and Tengwall 1920
p. 407. There seems to be a greater difference between the Ice-
landic Scirpus mire and Scirpéta in the British Isles (Tansley 1953
pp. 707-714). Sphagna are very prominent there and Calluna vul-
garis is one of Scirpus main concomitant species. On the whole,
however, the distribution of Scirpéta in Britain seems to reflect
the Icelandic conditions to a certain extent. The sociation which
I have here combined and classified as Scirpéta are to be sure all
intemally related. Each, however, has its own specific characteris-
tics and it would be justifiable, therefore, to distinguish them from
one another as individual sociations. But they have one characteris-
tic in common. In all of them Scirpus cæspitosus is predominant
in physiognomy and as a rule in covering as well.
61. Scirpus cæspitosus — Eriopliorum angustifolium sociation
(Tab. XIV A-B 1-8 and Tab. XIVx A-B 1-2)
The observations are from Vestfirðir and Húnavatnssýsla, but as
stated earlier the Scirpus mire is extensive in these parts, especially
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