Tordylium maximum L. (S and S-C-Eur., SW-As.) – A very rare and usually ephemeral alien. Apparently first recorded in 2004 in Belgium when it was seen by a canal bank in Sint-Joris (Beernem). In 2010 also observed on the unloading quay for cereals in the port of Roeselare (a single specimen) and the same year also in relative abundance near a grain storage in the port of Gent (Sifferdok). In the latter locality it is more or less persisting and was still seen in 2014.
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Selected literature:
Adams K.J. (1999) Flora of the Lower Thames Valley, Part 1. Tordylium maximum L. Essex Naturalist 16: 75-78.
Kalheber H. (1982) Tordylium maximum L. im Mittelrheingebiet und im Taunus. Hess. Flor. Briefe 31(2): 31-32.
Troiani H. & Prina A. (1995) Tordylium, género de Apiaceae adventicio en la República Argentina. Hickenia 2(24-31): 115-118.