There is a nomenclatural dispute concerning the application of the name A. longispathum Redoute. This name, if treated as conspecific with A. dentiferum, holds priority (a view supported by Jauzein and Tison 2001; which is followed here). On the contrary, Brullo et al. (2008) consider A. dentiferum as a taxon different from A. longispathum. The latter name, according to Brullo and Guarino (2017), should be applied to plants historically known in FVG, for Trieste area, and formerly called A. paniculatum L. The latter species, repeatedly wrongly recorded for Italy, is actually limited to E Europe (S Russia, Ukraine; Salmeri et al. 2016).

Abruzzo; Calabria; Campania; Emilia-Romagna; Friuli Venezia Giulia; Lazio; Liguria; Lombardia; Marche; Molise; Piemonte; Puglia; Sardegna; Sicilia; Trentino-Alto Adige: naturalizzata / naturalized; Toscana; Umbria; Veneto;