1. Campsis radicans (L.) Seeman (SE-U.S.A.) – An exceptional escape from cultivation. Few saplings were recorded on a foot of a wall in the city of Brugge in 2004. An identical record is available from Germany (Adolphi 1997). Furthermore sometimes seen as a relic of cultivation (abandoned gardens, old parks, etc.) or on demolition sites.
The exact identity of the plants in cultivation (and as escapes) is sometimes critical. According to Alexander (2000) Campsis x tagliabuana is more common than either parent.
References:
Adolphi K. (1997) Neophytische Kultur- und Anbaupflanzen als Kulturflüchtlinge des Rheinlandes, 1. Nachtrag. Osnabr. Naturwiss. Mitt. 23: 27-36.
Alexander J.C.M. (2000) Campsis. In: Cullen J. & al. (eds.), The European Garden Flora, vol. 6. Cambridge University Press, Cambridge: 351-352.