Valantia calva SynonymySource: Marhold, K. (2011+): Rubiaceae (pro parte majore). – In: Euro+Med Plantbase - the information resource for Euro-Mediterranean plant diversity.Valantia calva Brullo in Bot. Notiser 132(1): 61. 1979ContentDistribution Bibliography Distribution ● Si(S) Euro+Med endemicA: Sicily, with Malta (Sicily nativeA) Bibliography A. Pignatti, S. 1982: Flora d'Italia 2