Greinar (Vísindafélag Íslendinga) - 01.01.1935, Side 68

66
groups (H. M. H., 1930). No long investigation is need-
ed to see how greatly the E-group is dominant, in 1—3
81—89 %. The E-group is less prevalent in the glades
except no. 5 where it is 81,1 %. This is in full accord-
ance with the results of other investigations, namely that
the copse even though it is of low stature affords shelter
to the plants of southern distribution, which demand
great warmth. Yet it may seem strange that in circling
5 no difference can be seen. But there is some difference
in the conditions prevailing there and those in circling
4. No. 5 is situated further down on a slope, where there
is more shelter and a moister soil than in no. 4. On the
whole the conditions in no. 5 are much more similar to
those in the copse itself.
In considering the life-forms it will be seen that H is
predominant everywhere, though less of them are to be
found in the bogs. There is no particular difference in
this respect between circlings in the copses and in the
open fields. They are all formations which are rich in H.
The percentage of H is highest on the slopes of 'the ra-
vines which turn most towards the south. There the
snow is deep in winter but the sun begins to warm them
early in the summer. The percentage of H goes along
with that of E, as is to be expected since they are both
plants which demand heat. The G species is nowhere
numerous save in the bog-land, there it nearly reaches
the same percentage as H. But this bog is unusually
rich in H, because otherwise the bogs are usually G-
formations. But it must be noted that the bog is both
small in area and comparatively dry, and besides on
such a slope that water cannot stay there. The percent-
age of Ch is unusually low, both in the copse and out-
side it. It seems to me that here and elsewhere in the
district the growth of woody plants is not widespread;
dry meadowland is the predominant formation every-
where.