Bartsia trixago L. (syn.: Bellardia trixago (L.) DC.) (Medit.) – A rare and ephemeral alien. Apparently first recorded in 1951 on rough ground in Oostende, without obvious vector of introduction (Verloove 2006). In 2011 and 2014 seen as a grain alien near the warehouses at the Amerikadok in the Antwerp port area. In 2017 also observed in a transloading zone near a canal in Obourg.
Selected literature:
Bargain B., Bioret F. & Corillion R. (1988) Bellardia trixago (L.) All. (Scrophulariacée), espèce nouvelle pour le Finistère. Monde Pl. 83(432): 9-11.
Do L.H., Holmes W.C. & Singhurst J.R. (1996) New county records for Bellardia trixago (Scrophulariaceae) in Texas. Sida 17(1): 295-297. [available online at: http://www.biodiversitylibrary.org/item/34588#page/297/mode/1up]
Lipscomb B. (1982) Bellardia trixago (L.) All. (Scrophulariaceae) adventive in Texas. Sida 9(4): 370-374. [available online at: http://www.biodiversitylibrary.org/item/38211#page/385/mode/1up]
Singhurst J.R., Mink J.N. & Holmes W.C. (2012) Bellardia trixago (Orobanchaceae): 40 years of range expansion in Texas and a first report from Louisiana. Phytoneuron 2012-4: 1-4. [available online at: http://phytoneuron.net/PhytoN-Bellardia.pdf]
Verloove F. (2006) Catalogue of neophytes in Belgium (1800-2005). Scripta Botanica Belgica 39: 89 p. [available online at: http://alienplantsbelgium.be/sites/alienplantsbelgium.be/files/tabel_2.pdf]