Close-up image of leaves.

Close-up image of flowers.

Image of branches and flower stems.

Image of two mature trees.

Brief description and references, map showing the progressive distribution of the species in Massachusetts from 1860 to 1978.

Stewardship document provides history of the plants' migration from China to the Americas, associated ecological problems, management tactics, extensive bibliography and several detailed photographs. From The Nature Conservancy.

Brief description, photograph of large specimen in Iowa.

North Carolina State University fact sheet, photograph by Alice B. Russell. References A Tree Grows in Brooklyn.

Scholarly articles from the bibliography of the Brooklyn Botanic Garden's Metropolitan Flora Project.

Images, taxonomy, US range maps, and links.

Description of the plant, its distribution and the problems it causes, plus detailed information on management techniques. From the Plant Conservation Alliance.

Brief description, several detailed photographs.