As result of continued studies in various regions of the Alpes (Switzerland: Ct. Grisons, Ct. Valais, Ct. Ticino; Austria: Carinthia) 2 new species and 2 new subspecies of the genus Hieracium L. (Compositae) are described and illustrated. Their taxonomic relationships are discussed.
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Two species (Hieracium sibaricum, H. pillii) and 3 subspecies (H. diaphanoides subsp. semiorbiculare, H. glaucinum subsp. semibasalticum, H. glaucinum subsp. domimontis) are described as new for science from the Burgenland (Austria).
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