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KEYWORDS: Australia, New Caledonia, New Zealand, biogeography, phylogeny, new species, Australie, Nouvelle Calédonie, Nouvelle Zélande, biogéographie, phylogénie, espèces nouvelles
The present contribution discusses species of Russula subsection Roseinae Singer ex Sarnari from the southern hemisphere. Russula incrustata Buyck, sp. nov. and R. koniamboensis Buyck, sp. nov. are described from New Caledonia, R. purpureotincta R.F.R. McNabb from New Zealand is redescribed based on new collections and two sequestrate species, R. albobrunnea T.Lebel from Australia and R. kermesina (R.F.R. McNabb) T.Lebel from New Zealand are shown to be the first known sequestrate taxa in Roseinae. The systematic placement and originality of these southern taxa is discussed. The definition of subsection Roseinae is emended.
Russula (Basidiomycota, Russulales, Russulaceae) sous-section Roseinae dans l'hémisphère sud.
La présente contribution discute les espèces de Russula sous-section Roseinae Singer ex Sarnari de l'hémisphère sud. Russula incrustata Buyck, sp. nov. et R. koniamboensis Buyck, sp. nov. sont décrits de la Nouvelle Calédonie, R. purpureotincta R.F.R. McNabb de la Nouvelle Zélande est redécrit sur la base d'autres collections et deux espèces sécotioïdes, R. albobrunnea T.Lebel d'Australie et R. kermesina (R.F.R. McNabb) T.Lebel de la Nouvelle Zélande sont les premières espèces sécotioïdes qui font partie des Roseinae. La position systématique ainsi que l'originalité de ces espèces de l'hémisphère sud sont discutées. La définition de la sous-section Roseinae est émendée.
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