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54
tliem are very rare in northern Dalarne. The two last mentioned
are rather continental plants.
In Fennoscandia Gypsophila also occurs in Skåne, ön the isles of
Öland and Gotland, and in some plaees in Finland. In Skåne the
author has found it in a planted pine-forest and ön sand-fields near
the lake Snogeholmssjön. The plants found in these associations
are mentioned ön pp. 38—40 (A and B in the list). Of particular
interest is the occurrence of some plants characterizing the steppes
of southeastern Europé, viz. Carex arenaria, Gypsophila fastigiata,
Helichrysum arenarium and Pulsatilla pratensis.
Ön the isles of Öland and Gotland Gypsophila occurs ön
lime-stone-fields (S\v. alfvar») and sand-fields.
In Finland Gypsophila is found ön the Isthmus Karelicus, in
Sata-kunta, Kuusamo and Lapponia Imandræ, as well ön sand-fields as
ön rocks.
Except in Fennoscandia, Gypsophila occurs in the western parts
of Russia, in Austria, Hungary, eastern Germany and very seldom
in two districts of western Germany. In the central parts of its
sphere of distribution Gypsophila is a plant rather characteristic of the
sandy pine-forests and the sand-pusztas. Ön the sand-pusztas of
Hungary it belongs to the Stipa-society, which has a very great
phy-siognomical likeness to the Carex arenaria-society at
Snogeholmssjön in Skåne.
Gypsophila in Fennoscandia and western Germany is generallv
considered a relict from a period with a climate möre favourable
to steppe-plants than the present one. The Scandinavian
steppe-plants have probably immigrated to Fennoscandia during the last
part of the Ancylus-time.
The habitats of Gypsophila in Dalarne do not belong to a district
of especially continental climate. The author thinks, that the
heat-ing of its vegetation-ground during the summer renders its existence
here possible. Any climatological explanation of its occurrence in
Finland (e. g. ön the Kola-peninsula) is not possible at Ieast for
the present. Gypsophila must have spread over long distances to
plaees of favourable edaphical conditions. Bul it is possible, that its
introduction to Mora, where it now occurs, took place at a time,
when the vegetation of its habitats was not so closed as to-day.
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