Senecio inaequidens DC.

English Narrow-leaved ragwort ISEIA: B2 – Watch List
Lëtzebuergesch Schmuelt Kräizkräitchen EASIN
Français Séneçon du Cap Wikipedia: Wikipedia - English - Narrow-leaved ragwort Wikipedia - Français - Séneçon du Cap Wikipedia - Deutsch - Schmalblättriges Greiskraut Wikipedia - Nederlands - Bezemkruiskruid
Deutsch Schmalblättriges Greiskraut Wikispecies: Wikispecies - Senecio inaequidens
Nederlands Bezemkruiskruid Back to the list of neophytes

Report the species

Report Senecio inaequidens to the National Museum of Natural History.

Importance and distribution in Luxembourg

Distribution map of Senecio inaequidens DC. in Luxembourg. Recorder database, MNHNL, 23.01.2019.

The first observation in the wild of Senecio inaequidens in Luxembourg dates from 1988. It was found on 31st July 1988 in Differdange, municipality of Differdange (Reichling 1990). In 2008 and 2009, isolated plants have been observed in the northern part of Luxembourg (Esch/Sûre, Harlange). In 2012, all in all only 14 observations were documented in the Recorder database. In 2017, after a survey along highways, there were 24621 observations indicated in the Recorder database (Frankenberg & Gräser 2014).

But while the first populations of the plant were documented in industrial areas in the south of Luxembourg, it took the species only a few years to spread to Luxembourg city as well as to the German and Belgian borders, using the motorway network as a dispersal route. A study from 2014 showed that the species populated almost the entire motorway network of Luxembourg (Frankenberg & Gräser 2014) by then.

The species continues to expand its range and will probably have negative impacts on biodiversity as soon as it spreads from motorways and roads into grassland, pastures and rock ecosystems.

Risk assessment

ISEIA protocol: B2 (3+2+2+3) = Watch List (Ries et al. 2013: 19).

Bibliography concerning Luxembourg

  • Colling, G. et L. Reichling, 1996. Notes floristiques 1994-1995. Bull. Soc. Nat. luxemb. 97: 25-38. [PDF 596 KB]
  • Colling , G. & Y. Krippel, 2001. Notes floristiques. Observations faites au Luxembourg (1998-1999). Bull. Soc. Nat. luxemb. 101: 33-48. [PDF 331 Kb]
  • Frankenberg, T. & P. Gräser, 2014. Vorkommen des Schmalblättrigen Greiskrauts (Senecio inaequidens DC.) in Luxemburg, Erfassung der aktuellen Verbreitung der Art entlang der Autobahnen und Autobahnzubringer. Unveröff. Studie des Büros EFOR-ERSA im Auftrag Nationalmuseums für Naturgeschichte, Oktober 2014. 6 S. + Anhang [PDF-Bericht, PDF-Übersichtskarte].
  • Krippel, Y. & G. Colling, 2008. Notes floristiques. Observations faites au Luxembourg (2006-2007). Bull. Soc. Nat. luxemb. 109: 59-76. [PDF 549 KB]
  • Krippel, Y. & G. Colling, 2010. Notes floristiques. Observations faites au Luxembourg (2008- 2009). Bull. Soc. Nat. luxemb. 111: 11-32. [PDF 209 KB]
  • Krippel, Y. & G. Colling, 2012. Notes floristiques. Observations faites au Luxembourg (2010-2011). Bull. Soc. Nat. luxemb. 113: 67-82. [PDF 579 KB]
  • Krippel, Y. & G. Colling, 2014. Notes floristiques. Observations faites au Luxembourg (2012-2013). Bull. Soc. Nat. luxemb. 115: 109-124. [PDF 893 KB]
  • Reichling, L., 1990. Observations floristiques au Luxembourg 1980-1989. Bull. Soc. Nat. luxemb. 90: 55-70. [PDF 808 KB]
  • Ries, C., Y. Krippel, M. Pfeiffenschneider & S. Schneider, 2013. Environmental impact assessment and black, watch and alert list classification after the ISEIA Protocol of non-native vascular plant species in Luxembourg. Bull. Soc. Nat. luxemb. 114: 15-21. [PDF 652 KB]

Suggested citation of this webpage

Ries, C. & M. Pfeiffenschneider (Eds.), 2019. Senecio inaequidens DC. In: - Invasive Alien Species in Luxembourg. URL: [23.01.2019].

 Last updated on Tue, Apr 10, 2018.