Cyclachaena, which belongs to the family Asteraceae of the order Asterales, has been introduced and semi-naturalized in central and southern Britain, partly via seeds bought for bird food (which means typical varieties of seeds, nuts, or dried fruits eaten by birds).
Iva xanthiifolia), known as giant sumpweed, is a North American plant species in the sunflower family, Asteraceae. Asterales Order: It has been introduced and semi-naturalized in central and southern Britain, partly via seeds bought for bird food. Bird food or bird seed is food, typically varieties of seeds, nuts, or dried fruits eaten by birds. 
