Campanula rhomboidalis L., Sp. Pl.: 165. 1753 Campanula rhomboidalis L., Sp. Pl.: 165. 1753is basionym for Campanula rotundifolia subsp. rhomboidalis (L.) Bonnier in Bonnier & Douin, Fl. Ill. France 7: 47. 1924Taxon for this nameCampanula rhomboidalis L., Sp. Pl.: 165. 1753