Hypericum densifolium SynonymySource: Marhold, K. 2011+: Hypericaceae. – In: Euro+Med Plantbase - the information resource for Euro-Mediterranean plant diversity.Hypericum densifolium P. D. Sell in Sell & Murrell, Fl. Gr. Brit. Ireland 1: 692. 2018ContentDistribution Bibliography Distribution ● Br Euro+Med endemicA: Great Britain nativeA Bibliography A. Sell, P. D. 2018 – In: Sell & Murrell, G., Fl. Gr. Brit. Ireland 1. – Cambridge. p 692