Pimpinella anisum L. (As.) – A very rare and always ephemeral alien. Apparently only documented a few times, at first on waste land in Anderlecht in 1928. Most recently seen on the gravelly, exposed banks of river Maas in Dilsen-Stokkem in 2011.
Pimpinella anisum is only rarely cultivated as herb (spice) in Belgium. The few records are probably associated with birdseed. The species is a component in commercial birdseed mixtures (e.g. Hanson & Mason 1985).
Hanson C.G. & Mason J.L. (1985) Bird seed aliens in Britain. Watsonia 15: 237-252.