The scientific or taxonomic name would be Rosa rugosa rubra.
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In a warm temperate climate, you prune either after flowers have faded if a display of rosehips is not important, or in winter. Rosa rugosa usually needs little pruning - which is just as well!
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Rosa rugosa, R. canina, R.acicularis and R. cinnamomea.
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The scientific or taxonomic name would be Rosa rugosa magnifica.