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Salix myrtilloides and Salix × onusta in Slovakia

The authors bring actual state of recent occurrence of the rarest willows species Salix myrtilloides, its critically endangered population from northern part of the Western Carpathians. First original data on recent existence and distribution of the interspecific hybrid Salix × onusta (= S. myrtilloides × S. aurita) completes at the same time knowledge on hitherto unknown past occurrence of S. myrtilloides in the Western Carpathians and extinction of that population.