Rit (Vísindafélag Íslendinga) - 01.06.1975, Blaðsíða 127

Of Scirpus cæspitosus; in fact, N. stricta often occurs in Scirpus
sociations.
Sometimes, however, N. stricta becomes the main species of semi-
moist mire strips, and the observations are from an area of that
kind in Bolungavík and Skálavík. The topography is similar on all
those sites. Analysis 8, however, is made in a typical sloping mire.
Analyses 9—10 are from the bank of a brook. The vegetation cover
is continuous and N. stricta is completely dominant, both in phy-
siognomy and covering. Moss is insignificant. Carex Bigelowii de-
serves mention as a prominent species which comes close to the
character species, A. odoratum, in frequency and ahundance. Equi-
setum palustre is often high in frequency as well and Deschampsia
flexuosa occurs fairly often. Eriophorum angustifolium occurs in
all the analyses, hut is insignificant everywhere. This sociation,
therefore, contains a mixture of flói, mýri and snow-patch species.
The number of species is rather small. The E percentage is fairly
high and H is a dominant lifeform. I have observed the same soc-
ciation at Skipalón in Hörgárdalur. It was below a fairly slope and
separated it from an Equisetum palustre — C. nigra sociation. The
ground was somewhat drier than the area where the analyses were
taken and the snow cover was obviously heavy, although this was
not a snow-patch proper, since it is only a few metres above sea
level. Many of the species were the same as have been mentioned
before, but more dry-ground species occurred.
I elso have an observation of a Nardus mire from Grundarfjörður.
The mire was adjacent to a gully formed by a stream. The vegeta-
tion was divided into clearly delimited strips. There was a Des-
champsia cæspitosa-Agrostis tenuis — C. nigra sociation next to the
slope. Then it was replaced by the Nardus sociation which was
nch in Scirpus cæspitosus, followed by a Scirpus cæspitosus-Eri-
ophorum angustifolium sociation. The accompanying species of
Nardus were mostly those which have already been mentioned,
with the exception of Anthoxanthum which was absent.
d. Shrub-mýri
Dwarf-shrubs were conspicuous in most of the mire sociations
which have already been described. Salix glauca and S. herbacea,
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