Conyza sumatrensis (Retz) E. Walker - neu für Norddeutschland
Conyza sumatrensis was found for the very first time in Northern Germany (Gartow, district of Lüchow-Dannenberg). A continuously growing population developed starting from a accidentally introduced individual. Therefore a local naturalisation can be expected. Attention should be paid to further occurrences in Germany, because according to the experiences in the neighbouring western and southern countries further spreading is to be expected. The most important differentiating characters to other Conyza species are listed.
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