Trachelium caeruleum subsp. lanceolatum
Synonymy
Source: Castroviejo, S., Aldasoro, J. J. & Alarcón, M.; with contributions from Hand, R. (2010+): Campanulaceae. – In: Euro+Med Plantbase - the information resource for Euro-Mediterranean plant diversity.
Trachelium caeruleum subsp. lanceolatum, Comp. Fl. Ital.: 457. 1882