Hydrangea arborescens SynonymySource: Marhold, K. (2011+): Hydrangeaceae. – In: Euro+Med Plantbase - the information resource for Euro-Mediterranean plant diversity.Hydrangea arborescens L., Sp. Pl., ed. 1: 397. 1753ContentDistribution Bibliography Distribution [It] Euro+Med not endemicA: Italy, with San Marino and Vatican City introducedA Bibliography A. Pignatti, S. 1982: Flora d'Italia 1