Rit (Vísindafélag Íslendinga) - 01.06.1939, Blaðsíða 15

15
V. THE VEGETATION.
The observations on the vegetation are made on C.
Raunkier’s method. A circle of 1—10 m2 is used and 10 ob-
servations made in each area. C. Raunkiær’s formations
are also used.1 The geographical division is the same as
Mölholm Hansen uses (Hansen, 1930).2 It would have
been desirable to have been able to have given a survey
of the moss-vegetation also but because it has been so little
investigated in this country it was not possible.
A. SAND, SANDY GRAVEL AND GRAVEL
FORMATIONS.
Observations 1—2, Sand, were made in ”Botninn” on
June 23rd 1933, h = 1—2 m above sea level. Obs. 3—4,
sandly gravel, were made in ”Kinnin” in ”Snæfjall” July
lOth 1933, height 50—100 m above sea level. Obs. 5—6,
gravel, made July lst 1933.
1. The Sand Formation (tables 5 A and 5 B). The soil
is loose and dry, dependent so far as moisture is con-
cerned on rainfall from day to day; it also contains little
organic matter. The sand formation is peculiar by reason
of the few species, only five, and their distribution, only
0.7—0.9, and 3 of these five species Atriplex hastatum L.,
Honckenya peploides L., Ehrh and Cacile maritima Scop.
var. latifolia Desf. only grow in sand and preferably near
the sea.
If one looks at the biological spectrum then the low A
% fig. 28.3—33.3 is prominent and all falls under Al, i.e.,
in other words, is sub-arctic, it also all comes under the
1) Ch = Chamæphytes, H = Hemikryptophytes, G = Geophytes,
K = Kryptophytes, and Th = Therophytes.
2) A = Arctic, E = European, A 3 is most northerly, and E 1
most southerly.