STUDIES ON THE VEGETATION OF ICELAND 83 
TABLE 198. 
Biological Spectra of the Melar- and Mo Vegetation at Lekjamot. 
AE Re 1 ANS EE a 
| BR “ 
en... 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 
ee | 60.0 | 77.9 | 79.2 | 66.0 | 62.0 60.0 52.1 
ese 40.0 | 22.1 | 20.8 | 34.0 | 38.0 | 39.1 | 47.9 
20  . | 41.1 | 57.9 | 522 | 403 | 38.3 | 36.2 | 29.0 
ee 13.3 | 144 | 184 | 189 | 164 | 169 | 149 
Lo rer oa Sg aloes bee ge 2 5.6 5.6 8.7 || 6.8 7.3 7.8 8.2 
ee 38.9 | 19.0 | 19.3 | 218 | 27.5 | 21.5 | 23.7 
a Sees pe NE CA ole ae A Fr i 0 
eee » 1.0 0.5 5.4 3.1 | 42 9.3 
Es dede nie e 2 0.5 > | » 0.2 | » 3.9 
NE es 50.0 | 43.6 | 41.1 | 35.1 | 345 | 29.1 | 20.3 
nm a nie 47.8 45.6 488 48.4 50.0 52.2 63.7 
sa a 8.2 Ga) de et 
AR » » » » > » » 
ns: an ies oe ARS 2.2 2.6 Ze. 09 ST 
Galium Normanni, Saxifraga opposilifolia, Arenaria ciliata, Minuartia 
verna, and Arabis petrea. 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 Lækjamét we 
may especially mention Rumex acelosella and Silene maritima, while 
the following species are characteristic of the melar at Vididalsfjall: 
Salix herbacea, Selaginella selaginoides, Juncus trifidus, Elyna Bellardi, 
Carex capillaris, Trisetum spicalum, 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* 
