The Botany of Iceland - 01.12.1912, Síða 178

164
H. JÓNSSON
South Iceland.
Vestmannaeyjar, much exposed,
steep, rocky coast. 20/5.
I. Ulothricetum U. flaccae.
II. Porphyretum P. umbilicalis.
III. Ascophylletum A. nodosi.
IV. Gigartinetum G. mamillosae,
broad belt, in it Corallina offici-
nalis, Ceramium acanthonotum,
Callithamnion, Delesseria alata.
V. Corallinetum C. officinalis, dis-
persed in it Laminariae.
Vestmannaeyjar, Víkin, considerably
exposed, sloping rocky coast. 21/e.
I. Ulothricetum U. flaccae.
Enteromorphetum E.*micrococ-
cae.
Acrosiphonietum.
II. The Fucus-belt.
Ascophyllum nodosum.
F. vesiculosus.
F. inflatus.
III. Gigartinetum )
G. mamillosae | floating
IV. Corallinetum I together.
C. officinalis )
V. Laminarietum L. * stenophyllae.
VI. Alarietum A. esculentæ.
VII. Laminarietum L. hyperboreae.
on flat rocks
between
crevices.
Vestmannaeyjar, the skerry,
considerably exposed, sloping rockj'
coast almost destitute of phanero-
gams. 18/5.
Uppermost, Cochlearia officinalis and
rosettes of Plantago maritima.
At the same level, in crevices:
I. Enteroniorphetum E.* micrococ-
cae, + Cladophora sericea.
II. Ulothricetum
U. flaccae
Prasioletum
P. stipitatae
III. Pelvetia canaliculata.
IV. Fucus spiralis.
V. Ascophylletum A. nodosi.
F. vesiculosus.
F. inflatus.
Under-veg. Callithamnionetum.
Antithamnion.
Gigartina.
VI. Gigartinetum
G. mamillosae.
VII. Laminarietum
L. * stenophyllae.
Under-veg. Phymatolithon po-
lymorphum.
South Iceland, south side of Reykjanes,
according to C. H. Ostenfeld’s diary.
Staður, wide foreshore,
considerably exposed. 12/6.
1. Pelvetia canaliculata.
-í- stunted F. vesiculosus.
2. Fucus spiralis, with stunted
Ascophyllum and
Cladophora rupestris.
3. a Ascophyllum + Polysiphonia fa-
stigiata, broad belt.
3.b Fucus vesiculosus formation,
in it F. inflatus, widely distributed,
3. c in it Gigartina.
4. Here and there in depressions
the formations:
Monostroma Grevillei and
M. fuscum.
+ Halosaccion.
Cystoclonium.
Ahnfeltia.
Dictyosiphon foeniculaceum.
Rhodymenia.
5. Laminaria + Alaria.
The foreshore between Staður and
Reykjanes. 18/«.
1. Uppermost, Porphyra umbili-
calis.
F. spiralis.
F. vesiculosus f. sphærocarpa.
Enteromorpha compressa.
2. F. inflatus-formation, widely dis-
tributed and in it Gigartina.