High Quality Content by WIKIPEDIA articles! Epilobium ciliatum is a species of willowherb known by the common names Fringed Willowherb and American Willowherb. This plant is found in many parts of the world. It is native to much of North America and eastern Asia, and it is an introduced species in much of Eurasia and Australia. It may be found in a great variety of habitats, including disturbed areas and roadsides.