Hieracium rizense, H. tersundagense, H. spodocephalum and H. polygonifolium, four species of H. subg. Hieracium from the Black Sea Region, which is one of the main centres of diversity of the genus in Turkey, are described as new to science and illustrated.
References
J. Freyn
1895: Ueber neue und bemerkenswerthe orientalische Pflanzenarten. — Bull. Herb. Boissier 3(10): 497–671. Google Scholar
V. J. Nikolaev
1989:
Hieracium muricellum (Asteraceae).
— Bot. Žurn. (Moscow & Leningrad) 74: 47–48. Google Scholar
N. Özhatay
,
Ş. Kültür
&
N. Aksoy
1994: Check-list of additional taxa to supplement Flora of Turkey. — Turk. J. Bot. 18: 497–514. Google Scholar
N. Özahatay
,
Ş. Kültür
&
N. Aksoy
;
1999: Check-list of additional taxa to supplement Flora of Turkey. — Turk. J. Bot. 23: 151–169. Google Scholar
P. D. Sell
&
C. West
1974:
Hieracium L. — Notes Roy. Bot. Gard. Edinburgh 33: 241–248. Google Scholar
P. D. Sell
&
C. West
1975:
Hieracium, Pilosella.
— Pp. 696–763 in:
P. H. Davis
(ed.), Flora of Turkey and the East Aegean Islands 5. — Edinburgh. Google Scholar
A. Üksip
1960:
Hieracium.
— In:
B. K. Šiškin
&
E. G. Bobrov
(ed.): Flora SSSR 30. — Moskva & Leningrad. Google Scholar
J. C. Willis
&
H. K. A. Shaw rev. by
1973: A dictionary of flowering plants and ferns, ed. 8. — London. Google Scholar
K. H. Zahn
1921–23:
Hieracium.
— In:
A. Engler
(ed.): Das Pflanzenreich 75: 1–288, 76: 289–576, 77: 577–864 [1921]; 79: 865–1146 [1922]; 82: 1147–1705 [1923]. — Leipzig. Google Scholar
