Galium hexanarium SynonymySource: Marhold, K. (2011+): Rubiaceae (pro parte majore). – In: Euro+Med Plantbase - the information resource for Euro-Mediterranean plant diversity.Galium hexanarium Knjaz. in Bot. Zhurn. (Moscow & Leningrad) 88(12): 86. 2003ContentDistribution Bibliography Distribution ● Rf(E) Euro+Med endemicA: Russia (E European Russia nativeA) Bibliography A. Knjazev, M. S. 2003: – Bot. Zhurn. (Moscow & Leningrad) 88(12). p 86