First report of Ambrosia psilostachya from Iran: an invasive plant species establishing in coastal area of Gilan province (N Iran).
The distribution of Ambrosia psilostachya in Bandar-e Anzali, Gilan, Iran was reported. In 2014, expanding new colonies of Ambrosia species were increasingly observed from roadsides and coastal areas of Bandar-e Anzali. In 2017, precise inspections using the authenticated identification keys indicated that, this is A. psilostachya. A. psilostachya is a quarantine weed in Iran.