A New Record of an Alien Species Oenothera Indecora (Onagraceae) for the Flora of Iran

Nowadays, one of the most important threats to the biodiversity is adventive invasive species. In recent years, numerous imported plants with high invasion behavior have been reported from the Caspian coasts, especially Guilan province. During a field mission related to collecting plant specimens from Hyrcanian forests in Guilan province, Oenothera indecora Cambess. from the Onagraceae family was collected and identified for the first time from the Siahkalrud area of Chaboksar and is reported as a new record for the flora of Iran. The species, which is native to South America grows outside its native range and it is now established as a neophyte in several tropical and subtropical areas. The most important morphological traits of this species have been compared with its closely related species, O. parodiana Munz. Also, the geographical distribution, photos of the plant, habitat, and distribution of the species in the world and Iran are provided. In the following, the alien species was investigated and compared in terms of some invasive aspects in the world and Iran.