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Report the species
→ Report Helianthus tuberosus to the National Museum of Natural History.
Importance and distribution in Luxembourg
Helianthus tuberosus is a plant that prefers well-lit, sandy, moist and nutrient-rich soils. It grows best in habitats repeatedly disturbed by floods (riparian areas) but may also occur in ruderal and agricultural environments. In Western European climatic conditions, the plant does not produce viable seeds and propagates vegetatively. Tubers and pieces of rhizomes are transported with rodents and flowing water, especially winter floods. The plant can produce dense and persistent monospecific populations along rivers, where it outcompetes native species, slows down natural colonisation by trees and favours river bank erosion. It can be a weed of agricultural fields either by invading the fields or by reducing the yield of consecutive crops.
The first documented observation of the species dates from 1956. It was found by Léopold Reichling on 30th September 1956 in Born (Municipality of Mompach). There are 410 observations indicated in the Recorder database (18/01/2018). Topinambur is widely distributed along the Lower Alzette, the Lower Sauer and the Moselle. Along the Alzette, important populations of the species often appear at the edge of corn fields.
ISEIA protocol: B2 (2+3+2+2) = Watch List (Ries et al. 2013: 18).
Bibliography concerning Luxembourg
- Krippel, Y. & G. Colling, 2006. Notes floristiques. Observations faites au Luxembourg (2004-2005). Bull. Soc. Nat. luxemb. 107: 89-103. [PDF 288 Kb]
- Pfeiffenschneider, M., P. Gräser & C. Ries, 2014. Distribution of selected neophytes along the main rivers of Luxembourg. Bull. Soc. Nat. luxemb. 115: 101-108. [PDF 3668 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. Helianthus tuberosus L. In: neobiota.lu - Invasive Alien Species in Luxembourg. URL: https://neobiota.lu/helianthus-tuberosus/ [21.08.2019].