Glebionis coronaria (L.) Tzvelev (syn.: Chrysanthemum coronarium L., Xanthophthalmum coronarium (L.) Schultz-Bip.) (Medit.) – A rather regular and increasing but always ephemeral alien. First recorded in 1903 on waste land in Sint-Kruis-Brugge. Subsequently also recorded in Oostende (1948), Mechelen (1955), Anseremme (1956), Beerse (1979) and Turnhout (1981), often on dumps. However, not formally recognized prior to 1997 (Verloove & Vandenberghe 1998). In the past decades frequently recorded in port areas or along canals, mostly associated with cereals (Antwerp, Ghent, Roeselare, Turnhout, etc.). Also sometimes seen in newly-sown road verges.
Most plants have whitish ligules with a yellow base and belong to var. discolor (d’Urv.) Turland while var. coronaria has concolorous ligules. The latter is somehow reminiscent of Glebionis segetum (see key for their separation). According to a thorough morphometric analysis by Cano & al. (2017) var. discolor is best accepted as a distinct species, G. discolor (d'Urv.) Cano & al.
Also, Glebionis coronaria (var. coronaria) is sometimes confused with Cota tinctoria in Belgian herbaria. Both are indeed superficially similar but easily distinguished: Glebionis has leaves with glabrous surfaces (villous to sericeous in Cota), receptacles scales are absent in Glebionis (receptacle paleate in Cota), etc.
 |
 |
 |
 |
Selected literature:
Cano E., Musarella C.M., Cano-Ortiz A., Piñar Fuentes J.C., Spampinato G. & Pinto Gomes C.J. (2017) Morphometric analysis and bioclimatic distribution of Glebionis coronaria s.l. (Asteraceae) in the Mediterranean area. PhytoKeys 81: 103-126. [available online at: https://phytokeys.pensoft.net/articles.php?id=11995]
Turland N.J. (2004) (1647) Proposal to conserve the name Chrysanthemum coronarium (Compositae) with a conserved type. Taxon 53(4): 1072-1074.
Verloove F. & Vandenberghe C. (1998) Nieuwe en interessante voederadventieven voor de Belgische flora, hoofdzakelijk in 1997. Dumortiera 72: 18-36. [available online at: http://alienplantsbelgium.be/sites/alienplantsbelgium.be/files/dum72p18.pdf]