Gamochaeta coarctata (Willd.) Kerguélen: a new allien species for Turkey

Asteraceae is the largest plant family in Turkey and represented by 138 genera 1336 species Turkey. In this paper, Gamochaeta coarctata (Willd.) Kerguélen (Asteraceae) which native South America, reported for first time as a new alien (İstanbul). The was noticed, population of more than 250 individuals on side walking path May 2021. order to identify unfamiliar plant, sample taken from its photographs were taken. When researched, it seen that not included Flora with literature review, identified determine area distribution wandered around land observed became established edges paths different routes, forest edge meadow dam lake. introduced taxonomical morphological features. Its ecological impact evaluated potential risks also. can be considered an have rapid expansion potential, but further field investigations are necessary avoid diffusion.