Chromosome numbers and DNA ploidy levels of selected species of hieracium s.str. (Asteraceae)

(ENG) Chromosome numbers and /or ploidy levels are reported for 44 species and subspecies of Hieracium s.str. from the following European countries: Andorra, Austria, Bulgaria, Czech Republic, France, Italy,Montenegro, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland and Ukraine. The chromosome numbers/DNA ploidy levels of H. bocconei (2n ~ 4x), H. bupleuroides subsp.leviceps (2n = 27), H. caesioides subsp. Caesioides (2n = 27),H. basifolium (H. caesium agg., 2n = 36), H. Plumbeum (H. caesium agg., 2n = 36), H. glaucum subsp. Nipholepium (2n = 27), H. gouanii (2n = 18),H. gymnocerinthe (2n = 27),H. ramondii (2n =27), H. recoderi (2n = 18), H. stelligerum (2n = 18), and H. tomentosum (2n = 18, 2n ~ 2x, 2n ~ 3x) were determined for the first time. New ploidy levels are reported for H. cerinthoides s.str. (2n = 27), H. humile (2n =36), and H. tommasinianum (2n = 27)