Notes on Hieracium alpinum and Hieracium nigrescens groups (section Alpina Fries) in the Eastern Sudeten (Mt. Králický Sněžník, the Hrubý Jeseník Mts.)

Taxonomic revision of the Hieracium alpinum and H. nigrescens groups (sensu Flora Europaea) in the Eastern High Sudeten (the Hrubý Jeseník Mts., Mt. Kralický Sněžník) is given. Within the H. alpinum group, H. alpinum L. s. str. and H. schustleri Zlatník have been recognized in the study area, the latter being endemic to the Krkonoše Mts. (West Sudeten) and Mt. Kralický Sněžník. In the H. nigrescens group, two subspecies names are erected to the species rank - H. chrysostyloides (Zahn) Chrtek jun. and H. nivimontis (Oborny et Zahn) Chrtek jun. Both these taxa, in all likelihood, represent endemics of the Eastern Sudeten. Determination key and remarks on local distribution are provided as well.