Rit (Vísindafélag Íslendinga) - 01.06.1975, Page 102

Analysis XIIIx. 1 is from Grundarfjörður at approximately
370 m above sea level. Sphagnum is so abundant there as to charac-
terise the countryside and consequently it would be most proper
to describe this as a Sphagnum-dominant variation. Analysis XIIIx
2 is from Hlíðardalur in Bolungavík. It was taken from a flat,
semi-moist tract, sloping towards the bed of a creek. C. rariflora
is dominant there, both in physiognomy and covering. Sphagnum
is insignificant. Salix herbacea is fairly frequent, the area being
close to Salicetum herbacea in the more elevated areas. The socia-
tion covers a fairly large tract, resembling snow-patch in general
appearance. This is the only observation where I have found C.
Bigelowii to any extent in a snow-patch.
Analysis XIIIx. 3 is from the vicinity of Stóra-Laxá in Hruna-
mannaafréttur. The ground is fairly damp in this area, but in the
drier tracts C. Bigelowii becomes overwhelmingly dominant. “Where
the analysis was taken, however, the character species were similar
in quantity. Salix glauca occurs to a considerable extent. Analysis
XIIIx. 4 is from Miklumýrar in Hrunamannaafréttur. It is taken
from low-lying ridges among flói sociations and it is widely dis-
tributed in this area. C. rariflora has the greatest covering. Salix
glauca and Vaccinium uliginosum occur to some extent.
56. C. Bigelowii — Equisetum palustre — Vaccinium uliginosum
sociation (Tab. XII A-B 8-9)
Only two observations exist, both from Vopnafjörður, near the
highland border. At that altitude this sociation is by no means
rare in the area. It is primarily distinguished from previous so-
ciations by the presence of Equisetum palustre as a dominant spe-
cies, which was missing in 55. C. rariflora, however, can occur to
a considerable extent in 56. The following species are missing here:
Calamagrostis neglecta, Equisetum arvense and Eriophorum angusti-
folium. Carex nigra and C. dioica, on the other hand, are conspicu-
ous. Thus the sociation is somewhat akin to the C. nigra — E.
palustre mýri. Eutroph-mesotrophic species appear to occur here
to a greater extent than elsewhere in the C. Bigelowii mýri. The
biological spectrum is identical to that of sociation 55. Where the
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