Galium petraeum SynonymySource: Marhold, K. (2011+): Rubiaceae (pro parte majore). – In: Euro+Med Plantbase - the information resource for Euro-Mediterranean plant diversity.Galium petraeum Coss.ContentDistribution Bibliography Distribution ● Ag Tn Euro+Med endemicA,B: Algeria nativeB; Tunisia nativeA Bibliography A. Pottier-Alapetite, G. 1981: Flore de la Tunisie 2. – Tunis B. Quézel, P. A. & Santa, S. 1963: Nouvelle flore de l’Algérie et des régions désertiques méridionales 2. – Paris