INDAGINI CITOTASSONOMICHE SUL GENERE HIERACIUM L. (ASTERACEAE) IN SICILIA

Cyto-taxonomic investigation on the genus Hieracium L. (Asteraceae) in Sicily - A cyto-taxonomical contribution on the Sicilian populations of the genus Hieracium L. is given. On the basis of literature data and field and herbarium investigations, the genus at issue is represented in Sicily by seven species, well-differentiated from the morphological and caryological viewpoint as well as ecologically and phenologically. They are: H.macranthum (Ten.)Ten. (2n=36), H. symphytifolium Froelich (2n=36), H. pallidum Biv. (2n=36), H. crinitum Sibth.&Sm. (2n=27), H. cfr. atrovirens Froelich (2n=27), H. lucidum Guss. (2n=18), H. cophanense Lojac. (2n=18).