Dianthus plumarius L. (E and C-Eur.) – A very rare and much decreasing, sometimes locally naturalized escape from cultivation. Already reported in the first half of the 19th century from old walls (surroundings of Verviers). Furthermore collected in rather few, widely scattered locations, all in Wallonia (Dinant, Dison, etc.). Apparently last seen on a cemetery wall in Ethe around 1955. Possibly overlooked.
Dianthus plumarius (and its numerous cultivars) belong to the most popular taxa of the genus in cultivation (Pinks). However, they are possibly less cultivated nowadays in Belgium.
Baksay L. (1972) Biosystematik der Dianthus plumarius L. (sensu lato) in Ungarn. In: Vida G. (ed.), Evolution in plants: 149-161.
Greimler J. (1998) Comparative investigations on populations of Dianthus plumarius agg. (Caryophyllaceae). Bot. Jahrb. Syst. 120(1): 87-117.
Hensen K.J.W. (1981) Het onderzoek van het sortiment Grasanjers (Dianthus gratianopolitanus en plumarius). Groen (Netherlands): 265-277.