Tree of Heaven (Ailanthus altissima) was introduced in the late 1700s. It crowds out native species; damages pavement and building foundations in urban areas (from USDA Plant Species Profiles).
Invasive Plant Atlas of New England website has images, similar species, management options and additional links for the Tree of Heaven, that are all related to New England and the northeast.
Plant Conservation Alliance has information on the Tree of Heaven's threat to the United States as a whole, multiple management options and contacts, as well as links to other useful resources.
USDA Plant Species Profiles overs introduction, impacts, provides images and includes additional resources .
USDA Plants Database provides extensive information on identification, distribution and occurrence; habitat types and plant communities throughout the US; regenerative processes; succession habitats; fire ecology, and management considerations.
Last updated July 26, 2019