Vrachanski Balkan Nature Park (Bulgarian: Природен парк „Врачански Балкан“) is a Nature Park in Bulgaria with an area of 30129.9 ha established on 21 December 1989. The flora of Vranchanski Balkan Nature Park includes ca. 1100 vascular plants, which accounts for ca. 28% of Bulgarian flora. In the Nature Park live endemic species, among which are the scarcely disseminated in Bulgaria Campanula jordanovii, Centranthus kellereri, Chamaecytisus kovacevii, Silene velcevii, as well as Centranthus kellereri and Silene velcevii, which account for ca. 50% of their global population.
Source: Wikipedia
