Hieracium piloselloides subsp. obscurum (Rchb.) Zahn in Hegi, Ill. Fl. Mitt.-Eur. 6: 1230. 1929
Hieracium piloselloides subsp. obscurum in Hegi, Ill. Fl. Mitt.-Eur. 6: 1230. 1929
is new combination for Hieracium obscurum, Iconogr. Bot. Pl. Crit. 1: 92. 1823