First report of Conyza sumatrensis in Romania
Conyza sumatrensis (Asteraceae) is native from South America and is now known as a very widespread species worldwide. In Europe, it was recorded for the first time in 1875 as an escapee from the botanical garden of Collioure in France (Pyrénées Orientales). The species is widespread in the Western and Southern parts of Europe. In Romania, the species is now recorded in the Dobrogea region, inside and close to the Constanța harbour, at the oil terminal, where approximately 400 individual plants were observed in July 2009. It is supposed that the species was involuntarily introduced by ships. Rapid spread of this species is expected in Romania if no actions are taken, however eradication measures could still eliminate the species from the country. In the countries neighbouring Romania, C. sumatrensis has been recorded in Serbia and in Bulgaria.
Sources
Anastasiu P ; Memedemin D (2012) Conyza sumatrensis: a new alien plan in Romania. Botanica serbica 36, 37-40.