Greinar (Vísindafélag Íslendinga) - 01.01.1967, Page 13

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Syðri-Reykir, Árnessýsla, S-Iceland, 1958; Hafnar-
fjarðarhraun, near a summer house, Gullbringusýsla,
SW-Iceland, 1961.
Cirsium heterophyllum (purpuraþistill), Neskaupstaður,
E-Iceland, 1955, and is still growing there.
Sonchus oleraceus (gyltufífill), Syðri-Reykir Árnessýsla,
S-Iceland, 1958.
Senecio nébrodensis (Sikileyjarfífill), Akureyri, N-Iceland,
1960.
Lactuca muralis (salatfífill), Reykjavík, SW-Iceland, 1950.
Helianthus annuus (sólfífill), Gamlahraun, Árnessýsla, S-
Iceland, 1950.
Centaurea scabiosa (fagurkornblóm), Stokkanes near Isa-
fjörður (the town), NW-Iceland, 1948.
Matricaria inodora (útlend baldursbrá), here and there in
newly seeded grassfields.
Rudbeckia laciniata (sólhattur), Reykjalundur, Kjósar-
sýsla, SW-Iceland, 1955.
Limnanthes douglasii (dögglingsbikar), Reykjavík, SW-
Iceland, 1953.
Cuscuta arvensis (vafsníkja), Varmaland, Kjósarsýsla, SW-
Iceland, 1953. In a greenhouse, parasitizing Chrysan-
themum plants.
Taraxacum spp. (fífill), Reykjavík and other localities. The
Taraxacum “species” have not been sufficiently studied.
Of these 66 species Anthriscus silvestris, Aegopodium
podagraria and Rorippa silvestris have become permanent-
ly established. In addition some are probably just about
to become so, such as Agropyron Smithii, Elymus mollis,
Lupinus nootJcatensis, Epilobium adenocaulon, Galium
mollugo and Cirsium heterophyllum.
In addition foreign strains of native species are also
introduced such as Poa spp., Agrostis spp. and other gras-
ses, Polygonum aviculare, Stéllaria media, Capsella bursa-
pastoris, Rumex acetocella, Taraxacum spp. and others.
These foreign strains spread out from towns and cultiv-
ated land.