User:Patrickdoleary/Ambrosia artemisiifolia

Distribution
The plant is native to: North America across Canada, the eastern and central United States, the Great Plains, and in Alaska; the Caribbean on Cuba, Hispaniola, and Jamaica; and South America in the southern bioregion (Argentina, Chile, Paraguay, Uruguay), the western bioregion (Bolivia, Peru), and Brazil.

The plant is considered to be invasive in many portions of Asia and Europe. The distribution of common ragweed in Europe and Asia is expected to expand northwards in the future due to climate change.

It is the most widespread species of the genus in North America, to which most of the other species of Ambrosia are endemic. During the summer it causes allergic reaction in those that are susceptible.