Oslo, Norway
Oslo, Norway

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Bjureke K.,Naturhistorisk Museum | Bredesen B.,Oslo Kommune | Gajda H.,Norsk Botanisk Foreining | Rosok O.,Fylkesmannen i Oslo og Akershus
Blyttia | Year: 2016

Rock cinquefoil Drymocallis rupestris (L.) Sojåk is a rare and threatened species in Norway. It is only growing at six localities in the inner Oslo fjord, on soils derived from base-rich, igneous rocks. The aim of this article is to publish the origin and location of two reinforcement attempts to conserve the species. These two reinforcements are intentional movements of plants into two existing populations of conspecies. We also describe how periwinkle Vinca minor and other invasive aliens have been removed prior to the reinforcement. The ex situ conservation programme at NHM has several purposes: conservation in the National seed bank and in living collections, education and research. Seeds from the seed bank can be used for reintroduction, reinforcement, habitat restoration and management. Seeds are collected with permit from the Norwegian Environment Agency and preserved in the National seed bank. From these deposits of seeds, 167 plants were propagated for transplanting to Hellvik, Nesodden and 19 for transplanting to Tåsen, Oslo. This was reinforcement, not reintroduction, as D.rupestris still excited at both localities. The project is a nice and effective collaboration between the County Govenor of Oslo and Akershus, the City of Oslo, Agency for City Environment, the Norwegian Society of Botany and the Natural History Museum, University of Oslo.

Elven R.,Naturhistorisk Museum | Fremstad E.,Norwegian University of Science and Technology
Blyttia | Year: 2012

In the summer 2012 Elven found the mainly arctic grass species Arctophila fulva in Lorn, Oppland in southern Norway, ca. 820 km from its nearest known localities at the head of the Bothnian Bay in Sweden and Finland and ca. 1020 km from the only previously documented Norwegian locality in Kautokeino, Finnmark. The species grows in the inundation zone along the river Finna, in constantly wet substrates, and sometimes rooted in shallow water with leaves floating in the river. The stands, along ca. 3 km of the river shores, are heavily grazed by sheep and cattle and only a few flowering culms were found. The structure of the inflorescence and the spikelets are more similar to those of arctic plants (e.g. plants from Svalbard) than to those in the Bothnian area and in Finnmark. The population may have its origin in bird dispersal from the Arctic rather than from northern Scandinavia.

Elven R.,Naturhistorisk Museum | Murray Og D.F.,University of Alaska Fairbanks | Solstad H.,Naturhistorisk Museum
Blyttia | Year: 2010

A revision of a circumpolar material of Juncus castaneus s. lat. supports recognition of two taxonomic entities, proposed by Russian authors as two species - J. castaneus and J. leucochlamys - by European and many North American authors as two subspecies - subsp. castaneus and subsp. leucochlamys - and by some North American authors as only one taxon. They are separable in several characters of the inflorescence - tepal size and shape, difference between outer and inner tepals, tepal length relative to capsule, and capsule shape and length - but not reliably in leaf width, structure of inflorescence, length of bracts, and colour of tepals and capsules as reported by other authors. Application of these other characters has resulted in confusion between the two entities in North America and Greenland and perhaps also in eastern Siberia and northeastern Asia. We have found no signs of intermediates even where the two taxa occur close together (as in Iceland) and accept two species. Juncus castaneus occurs in mainland Europe including Norway, eastern Iceland, and northwestern Siberia. Juncus leucochlamys occurs in northeastern Siberia and Asia, North America, Greenland, and in Svalbard and northwestern Iceland (as new to Europe).

The relations between the boreal forest species Pyrola rotundifolia and the Fennoscandian alpine P. norvegica in Norway are discussed. Diagnostic characters are reported. Intermediates are fairly common, with well developed pollen, and probably at least partly fertile. Treatment as two subspecies of P. rotundifolia has been proposed. However, assignment of P. norvegica as a subspecies to the circumpolar arctic P. grand/flora has also been proposed. Our conclusion is that P. norvegica morphologically is much closer to P. grandiflora than to P. rotundifolia, and should be regarded as a race of that species. Pyrola rotundifolia, on the other hand, is morphologically closer to the boreal eastern Siberian and North American P. asarifolia.

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