Synonyms: Epilobium acinifolium (homotypic); Epilobium carpetanum; Epilobium collinum f. angustifolium; Epilobium collinum f. elatius; Epilobium collinum f. latifolium; Epilobium collinum f. minus; Epilobium collinum f. ozanense; Epilobium collinum f. umbrosum; Epilobium collinum var. angustifolium; Epilobium ebrodunense (homotypic); Epilobium lapponicum (heterotypic); Epilobium montanum collinum; Epilobium montanum var. collinum; Epilobium montanum var. minus; Epilobium nutans (heterotypic); Epilobium ramosissimum (heterotypic); Epilobium sylvestre (heterotypic)