20. Cyanus woronowii (Bornm. ex Sosn.) Soják (1972: 132) .

Centaurea triumfettii var. pleiocephala Bornmüller (1914: 6) . Centaurea woronowii Bornmüller ex Sosnovsky (1926: 91) . Type:— TURKEY. A8 Çoruh: distr. Artvin, in detritibus lapidosis inter Artvin et Ardanuč (loc. Tskal-Okro), 9 July 1911, Woronow 6187 (B 10 0366313!).

Distribution: — Cyanus woronowii is a rare endemic of Artvin Province, NE Turkey (Fig. 10).

Selected specimens examined:— TURKEY. A8 Çoruh (Artvin): Artvin, stony slopes, 700 m, 28 April 1960, Stainton 8278 (E!) ; 20 km S of Artvin, 730 m, Huber-Morath 15880 (Hb. Hub. - Mor.!); 7 km E of Ardanuç, 1500 m, Watson et al. 3102 (E!) .