Linaria chalepensis (L.) Mill. (Medit.) – A very rare and ephemeral alien. Probably recorded only twice: at first in 1954 on a grain dump near Verviers and also in 2002 on the verge of an unloading quay for cereals in the port area of Roeselare (Verloove 2006). Linaria chalepensis is a weed of cereal fields in its area of origin but only rarely encountered elsewhere, for instance in the British Isles (Clement & Foster 1994) and in Scandinavia (Karlson 1997).
Selected literature:
Clement E.J. & Foster M.C. (1994) Alien plants of the British Isles. BSBI, London: XVIII + 590 p.
Hamdi S.M. & Assadi M. (2007) A new subspecies and a record of Linaria from Iran. Iran.
Journ. Bot. 13(1): 37-42. [available online at: http://www.sid.ir/en/vewssid/j_pdf/105320072508.pdf]
Henrard J.Th. (1918) Bijdrage tot de kennis der Nederlandsche adventiefflora. Nederl. Kruidk. Arch. 1918: 181-205.
Karlsson T. (1997) Förteckning över svenska kärlväxter. Svensk Bot. Tidskr. 91: 241-560.
Verloove F. (2006) Graanadventieven nieuw voor de Belgische flora, hoofdzakelijk in de periode 2001-2003. Dumortiera 88: 1-6. [available online at: http://alienplantsbelgium.be/sites/alienplantsbelgium.be/files/dum88p1.pdf]