The Botany of Iceland - 01.12.1945, Side 90

432
STEINDOR STEINDORSSON
I. Species which, within the area of investigation, wére only found in
snow-patches or at any rate are very rare outside the snow-patches:
Subgroup i. Species common or
sociations.
Geranium silvaticum
Taraxacum croceum
Alchemilla minor
—• glomerulans
Sibbaldia procumbens
Vaccinium Myrtillus
Gnaphalium supinum
Anthoxanthum odoratum
dominant in some snow-patch as-
Bartschia alpina
Erigeron borealis
Rumex Acetosa
Veronica alpina
Phleum alpinum
Cerastium trigynum
Carex lagopina
Catabrosa algida
Subgroup 2. Rather rare species,
Deschampsia flexuosa
Gnaphalium norvegicum
Habenaria hyperborea
— viridis
Pyrola minor
Koenigia islandica
Sagina Linnaei
never dominants.
Gentiana tenella
— nivalis
Epilobium anagallidifolium
Viola palustris
Rubus saxatilis
Parnassia palustris
Cardamine pratensis
II. Species which are common or dominant in snow-patches, but which
occur with similar frequency in other formations within the area of
investigation.
Salix herbacea
— glauca
Ranunculus acer
Polygonum viviparum
Carex rigida
Thalictrum alpinum
Equisetum pratense
— arvense
— variegatum
Galium silvestre
Empetrum nigrum
Hierochloe borealis
Festuca rubra
Euphrasia latifolia
Cerastium alpinum
Agrostis canina
Vaccinium uliginosum
Poa alpina
Group I comprises 30, Group II 18 species, altogether 48 species
which the snow-patches offer just as good or better life conditions than
other formations at the altitude in question (c. 450-800 m above sea-
level).
The biological spectrum of this list of species shows the following
figures:
A 54-17
E 45.83
Gh 20.83
H 56.25
G 14.58
Th 8.34