Ferula rigidula SynonymySource: Hand, R. (2011+): Apiaceae. – In: Euro+Med Plantbase - the information resource for Euro-Mediterranean plant diversity.Ferula rigidula DC., Prodr. 4: 172. 1830=Ferula laeta Woronow in Trudy Bot. Inst. Akad. Nauk S.S.S.R., Ser. 1, Fl. Sist. Vyssh. Rast. 1: 219. 1933ContentDistribution Bibliography Distribution Ab(A N) Ar Rf(CS) Tu(A) Euro+Med not endemicA,B: Armenia nativeC,D; Azerbaijan (Azerbaijan (core) nativeB,D, Nakhchivan nativeB,D); Russia (North Caucasus nativeE); Turkey (Turkey, Asiatic part nativeA,F) Bibliography A. Davis, P. H. 1972: Flora of Turkey and East Aegean Islands 4 B. Karjagin, I. I. 1955: Flora Azerbajdžana 6. – Baku: Izdatel'stvo Akademii Nauk Azerbajdžanskoj SSR C. Takhtajan, A. L. 1973: Flora of Armenia 6. – Erevan: Izdatel'stvo AN ASSR D. Takhtajan, A. L. 2008: Konspekt flory Kavkaza 3(1). – Sankt-Peterburg & Moskva E. Komarov, V. L. (ed. Schischkin, K. & Bobrov, E.) 1951: Flora URSS 17. – Leningrad F. Güner, A. 2012: Türkiye Bitkileri Listesi. – Istanbul