AGERATINA ADENOPHORA (ASTERACEAE) NEW SPECIES TO THE ITALIAN ALIEN FLORA AND OBSERVATIONS ON ITS ENVIRONMENTAL THREATS

Ageratina adenophora is recorded for the first time in Italy (Campania region). Its naturalization status and ecology are discussed, also providing a morphological comparison with the related taxa (both occurring in Italy) A. ligustrina and Eupatorium cannabinum. Some remarks on potential threats for habitat and native flora are provided as well.