Typification of fourteen Linnaean names in the genus Hieracium (Compositae)

The typification of fourteen Linnaean names in Hieracium, viz. H. aurantiacum, H. auricula, H. chondrilloides, H. cymosum, H. dubium, H. glutinosum, H. hedypnoides, H. incanum, H. murorum var. pilosissimum, H. murorum var. sylvaticum, H. porrifolium, H. pumilum, H. sabaudum and H. tomentosum, is discussed. The designation of the nomenclatural types is based on the consultation of Linnaeus's original material and the literature cited in the respective protologue. The names are lectotypified using specimens preserved at UPS-BURSER and LINN, and two illustrations of Boccone and Dillenius. Linnaeus's original material of H. pumilum and H. pyrenaicum var. helveticum could not be found. A specimen in S-LINN that best conforms with the diagnosis for H. pumilum is selected as the neotype for that name. The application of the name H. pyrenaicum var. helveticum appears uncertain, and therefore it is treated as nomen ambiguum. Finally, epitypes are designated for H. porrifolium and H. tomentosum due to ambiguity in the interpretation of the lectotypes.