Ageratina adenophora (Asteraceae) new species to the Italia n alien flora and observations on its environmental threats

Abstract

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.