Aubrieta columnae Guss. (SE-Eur.) – A rare, locally naturalised escape from cultivation. Formerly seen on a gravelly bank of river Vesdre in 1896. Well-documented from an old wall in the city of Brugge (Balstraat): first collected there in 1966 and still present in abundance on the sun-exposed top of the very same wall (Verloove & Van Landuyt 2006). In the past years discovered in several different additional places, mostly in Wallonia (for instance in Dinant and Gimnée). Doubtlessly overlooked elsewhere.
All older records were initially ascribed to the very similar Aubrieta deltoidea. Both are easily distinguished on siliqua characters only.
Verloove F. & Van Landuyt W. (2006) Aubrieta columnae, sinds tientallen jaren standhoudend op een oude muur in Brugge (West-Vlaanderen, België). Dumortiera 88: 27.