Helianthus decapetalus (weed)
From Pestinfo-Wiki
Helianthus decapetalus (weed) L. - (thinleaf sunflower)
This species of sunflower is native to eastern North America, but has escaped cultivation in parts of Europe, where it is regarded as becoming invasive.
Publications covering Helianthus decapetalus (weed)
Euphytica (2006) 148, 17-33
Vera V. Protopopova, Myroslav V. Shevera and Sergei L. Mosyakin (2006)
Deliberate and unintentional introduction of invasive weeds: A case study of the alien flora of Ukraine