Baccharis L.
Baccharis is a large genus of ca. 350 species (Mabberley 2008; up to 450 according to other authors). All are native to the New World (predominantly in tropical South America). Few species are cultivated as shrubby ornamentals in Europe (Gardner 2000) but apparently only in climatologically favourable areas (none is mentioned, for instance, for Central Europe by Jäger & al. 2008). Baccharis halimifolia has become a noxious environmental weed in southwestern Europe and parts of Australia (see for instance Westman & al. 1975).
Literature:
Gardner M.F. (2000) Baccharis. In: Cullen J. & al. (eds.), The European Garden Flora, vol. 6. Cambridge University Press, Cambridge: 583.
Helwig F. (1990) Die Gattung Baccharis L. (Compositae-Asteraceae) in Chile. Mitt. Bot. Staatssamml. München 29: 1-456.
Jäger E.J., Ebel F., Hanelt P. & Müller G. (eds.) (2008) Rothmaler Band 5. Exkursionsflora von Deutschland. Krautige Zier- und Nutzpflanzen. Springer Verlag, Berlin: 880 p.
Mabberley D.J. (2008) Mabberley’s plant-book (3th ed.). Cambridge University Press, Cambridge: XVIII + 1021 p.
Muller J. (2006) Systematics of Baccharis (Compositae-Astereae) in Bolivia, including an overview of the genus. Syst. Bot. Monogr. 76: 341p.
Westman W.E., Panetta F.N. & Stanley T.D. (1975) Ecological studies on reproduction and establishment of the woody weed, groundsel bush (Baccharis halimifolia L. Asteraceae). Austral. J. Agric. Res. 26(5): 855-870.