Tunica thessala Boiss., Diagn. Pl. Orient. 8: 63. 1849 Tunica thessala Boiss., Diagn. Pl. Orient. 8: 63. 1849is basionym for Petrorhagia thessala (Boiss.) P. W. Ball & Heywood in Bull. Brit. Mus. (Nat. Hist.), Bot. 3: 156. 1964Taxon for this nameTunica thessala Boiss., Diagn. Pl. Orient. 8: 63. 1849