Global Short Term Trend: Decline of 10-30%
Comments: Though information on most current trends may not be available, A. tuberosa has certainly declined in certain parts of its range within the last few hundred years. Many of the open woods of the east, and virtually all of the prairies in the Midwest, have been destroyed for agriculture and development within this time period. It is not as common in Nebraska as it used to be because of changes in land use (Nebraska Natural Heritage Program). In the early 1900's the roots of A. tuberosa were commercially available for medicinal purposes (Weiner 1980). Presumably, this material was collected from the wild.
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