The Botany of Iceland - 01.12.1930, Page 93

STUDIES ON THE VEGETATION OF ICELAND
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Table 19 B.
Biological Spectra of the Melar- and Mo Vegetation at Lækjamót.
1 2 3 4 5 6 7
Points sum 450 780 828 1776 1704 1748 1420
Number of species 20 30 31 42 36 41 44
Density of species 4.5 7.8 8.3 17.8 17.0 17.5 14.2
A . . 60.0 77.9 79.2 66.0 62.0 60.0 52.1
E ... 40.0 22.1 20.8 34.0 38.0 39.1 47.9
A 3... . 41.1 57.9 52.2 40.3 38.3 36.2 29.0
A 2.... 13.3 14.4 18.4 18.9 16.4 16.9 14.9
A 1... 5.6 5.6 8.7 6.8 7.3 7.8 8.2
E 4.. . 38.9 19.0 19.3 21.8 27.5 21.5 23.7
E 3. . 1.1 1.5 1.0 6.8 7.3 9.4 11.0
E 2.... » 1.0 0.5 5.4 3.1 8.2 9.3
E 1.. » 0.5 » » 0.2 » 3.9
Cli .. 50.0 43.6 41.1 35.1 34.5 29.1 20.3
H .. 47.8 45.6 48.8 48.4 50.0 52.2 63.7
G . » 8.2 6.8 12.8 14.6 14.2 14.1
hh .. » » » » > » »
Th .. 2.2 2.6 3.4 3.6 0.9 4 6 2.0
Galium Normanni, Saxifraga oppositifolia, Arenaria ciliata, Minuartia
Verna, and Arabis petrœa. The last four species are only found in
melar, the others also in the mo where, however, their physiognomic
effect is obscured by more dominant plants.
Of species peculiar to the melar vegetation at Lækjamót we
niay especially mention Rumex acetosella and Sitene maritima, while
the following species are characteristic of the melar at Viðidalsfjall:
Salix herbacea, Selaginella setaginoides, Juncus trifidus, Elyna Bellardi,
Carex capillaris, Trisetum spicatum, Polygonum viviparum, Tofieldia
palustris, and Thalictrum alpinum. None of these species are specific
to melar, they may all be found in the surrounding mo formations.
The Mo Vegetation. Table 19 A, 4—7.
On the mo vegetation I was able to analyse 4 localities, 2 at
high and 2 at low levels, one set at the bottom of the valley and
one on the slope.
The surface of the mo is knolly here as elsewhere, but the top
6*