Rit (Vísindafélag Íslendinga) - 01.06.1975, Side 44

species, which covers more than E. angustifolium and it is at least
equally prevalent with regard to physiognomy. In many areas the
land is so dry that it approximates a mýri, and the vegetation could
be described as an intermediate stage between flói and mýri. It
should be noted in this context that Scirpus cæspitosus never grows
where the soil is very wet. Sphagnum is here in several places in
significant abundance, and Vaccinium uliginosum and Empetrum
often occm-, but these species do not belong to flói proper. The
suxface of this flói is patterned, i.e. with low, flat mounds only a
few centimetres higher than the surface of the hollows, but yet
elevated enough to make a difference in vegetation, so that E.
angustifolium and C. chordorrhiza are predominant in the hol-
lows, but Scirpus cæspitosus is most conspicuous on the mounds.
In other areas such a mosaic of sociations is out of the question,
but dry ground species occur mainly on the mounds. About indi-
vidual analyses the following should be noted.
Analysis no. 2 is from Hagi in Barðaströnd, taken in a flói with
a flat mound pattern, where the vegetation consists of a mosaic of
two sociations. On the mounds sociation no. 9 occurs, but in the
hollows sociation no. 7, i.e. E. angustifolium — C. rariflora and C.
chordorrhiza sociations. Analysis no. 3 is from Brjánslækur, where
there is also a flat mound pattern, but the mounds are so low as
to exclude any significant difference in vegetation. In the eastern
part of Rauðisandur from Máberg as far as Sjöundá this flói so-
ciation is very common. The topography is in many respects
similar to that in Vatnsnes. Analysis 1. Flat flói tracts in close
proximity to the sea. Upwards from the flói flats there rise rather
large sparse mounds with shrub growth, Betula nana, Vaccinium
uliginosum and in some places Betula pubescens. This sociation
may be regarded as the prevailing type in the mires there. Apart
from the character species the following species occurred at the
site: Carex dioica, C. capillaris, C. microglochin, C. nigra, C.
panicea, C. rariflora, Habenaria hyperborea, Juncus alpinus,
Luzula multiflora, Pinguicula vulgaris, Polygonum viviparum,
Thalictrum alpinum, Tofieldia pusilla, Triglochin palustre. About
analyses 4-8, which emanate from Borgarfjörður, Mýrar and Snæ-
fellsnes there is nothing specific to be said. In most respects they
are similar to what has already been related, and they have the
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