Symphyotrichum squamatum (Spreng.) G.L.Nesom, Phytologia

Verloove, Filip & Ardenghi, Nicola M. G., 2015, New distributional records of non-native vascular plants in northern Italy, Natural History Sciences 2 (1), pp. 5-14 : 12

Symphyotrichum squamatum (Spreng.) G.L.Nesom, Phytologia , 77 (1994, 3): 292. 1995.

( Asteraceae )

Naturalized neophyte new to the flora of the province of Alessandria (Piemonte) ( Pistarino et al., 1999).

ITALY. Piemonte. Prov. Alessandria: Tortona, bridge over river Scrivia , at entrance of A7 motorway, rough, bare ground, 09.09.2014, F. Verloove 11037 ( BR).

This South American species is fast spreading and considered invasive in large parts of the Mediterranean area, including Italy ( Celesti-Grapow et al., 2009a). In the Piemonte region it was known from Torino and Cuneo provinces ( Pistarino et al., 1999) but not yet from Ales- sandria.