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.