Asperula exasperata SynonymySource: Marhold, K. (2011+): Rubiaceae (pro parte majore). – In: Euro+Med Plantbase - the information resource for Euro-Mediterranean plant diversity.Asperula exasperata Klokov in Komarov, Fl. USSR 23: 695. 1958ContentDistribution Bibliography Distribution Rf(E S) Euro+Med: Russia (E European Russia nativeA, S European Russia nativeA) Bibliography A. Fedorov, A. A. 1978: Flora Partis europaeae URSS 3. – Leningrad