Symphyotrichum ciliatum (Ledeb.) Nesom (syn.: Aster brachyactis S.T. Blake, Brachyactis angusta (Lindl.) Britton, B. ciliata Ledeb. subsp. angusta (Lindl.) A.G. Jones, Erigeron ciliatus Ledeb.) (N-Am., Euras.) – A very rare and ephemeral grain alien. First recorded in small number on the unloading quay for cereals at the Amerikadok in the port of Antwerpen in 2003 and subsequently at the same location in 2005 and 2010. In 2009 also seen on waste land in La Hulpe.
Symphyotrichum ciliatum is a rather inconspicuous, weedy species and has been accommodated in several genera in the past (see synonymy). Even relatively recently it was still accepted as a member of the genus Brachyactis (Jones 1989). However, recent molecular phylogenetic analyses support its inclusion in Symphyotrichum (Brouillet & al. 2006).
This species is native in the easternmost parts of Europe. In recent years it is steadily expanding further to the west.
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Selected literature:
Bróź E. & Podgórska M. (2005) Symphyotrichum ciliatum (Brachyactis ciliata) (Asteraceae) w Polsce. Fragm. Flor. Geobot. Polonica 12(2): 291-299.
Brouillet L., Semple J.C., Allen G.A., Chambers K.L. & Sundberg S.D. (2006) Symphyotrichum. In: Flora of North America Editorial Committee (eds.), Flora of North America, vol. 20. Oxford University Press, New York-Oxford: 465-539.
Jones A.G. (1989) Aster and Brachyactis in Illinois. Bull. Illinois Nat. Hist. Surv. 34: 139-194.
Nobis M. & Pliszko A. (2016) New localities of Symphyotrichum ciliatum (Asteraceae) in Poland. Acta Mus. Siles. Sci. Natur. 65: 283-286. [available online at: https://www.researchgate.net/publication/311617712_New_localities_of_Sym...
Sârbu A. & Smarandache D. (2015) Symphyotrichum ciliatum an Invasive Species in the Romanian Flora – Contributions to the Knowledge of the Vegetative Organs Structure. Acta Horti Botanici Bucurestiensis 42(1): 5-22. [available online at: https://www.degruyter.com/view/j/ahbb.2015.42.issue-1/ahbb-2015-0004/ahb...
Sîrbu C., Oprea A., Eliáš P. & Ferus P. (2011) New contribution to the study of alien flora of Romania. J. Plant Develop. 18: 121-134. [available online at: http://www.plant-journal.uaic.ro/docs/2011/17.pdf]
Stadnicka-Futoma A. & Oklejewicz K. (2013) Nowe stanowisko Symphyotrichum ciliatum (Asteraceae) na Przedgórzu Rzeszowskim [New locality of Symphyotrichum ciliatum (Asteraceae) on Przedgórze Rzeszowskie]. Fragm. Flor. et Geobot. Pol. 20(2): 386-388.