Mile-A-Minute Weed

mile a minute weed

(Persicaria perfoliata)
*Not detected in Michigan*
WATCH LIST

Report this species to:

Greg Norwood, DNR Wildlife Division, norwoodg@michigan.gov or 517-342-4514. 

If possible, please take one or more photos of the invasive species you are reporting. Also make note of the location, date and time of the observation. This will aid in verification of your report. You may be asked to provide your name and contact information if follow-up is needed.

- Or - use the Midwest Invasive Species Information Network (MISIN) online reporting tool 

- Or - download the MISIN smartphone app and report from your phone - http://www.misin.msu.edu/tools/apps/#home

 

Identification:

  • Stems have recurved barbs, also on underside of leaf blades
  • Light green leaves are alternate and shaped like an equilateral triangle
  • Small white flowers, often inconspicuous
  • Deep blue colored fruit arranged in clusters

mile a minute weed
Leslie J. Mehrhoff, University of Connecticut, Bugwood.org

mile a minute weed
Jil M. Swearingen, National Park Service

mile a minute weed
Leslie J. Mehrhoff, University of Connecticut, Bugwood.org

Habitat: This herbaceous, annual, trailing vine colonizes open and disturbed areas with a preference for very wet soil. Typical infestation areas include stream banks, open space, roadsides, forest edges, and fence lines. Mile-a-minute weed thrives with abundant sunlight and uses its recurved barbs to attach to and climb over other plants.

Native Range: India to Eastern Asia, China, and islands from Japan to the Philippines

U.S. Distribution: Reported in Connecticut, Delaware, Massachusetts, Maryland, New Jersey, New York, Ohio, Pennsylvania, Rhode Island, Virginia, West Virginia, and Washington, DC

Local Concern: A dense population of mile-a-minute weed reduces native vegetation by limiting a plant’s ability to photosynthesize and survive. Christmas tree farms are at risk because of the vine’s propensity to smother tree seedlings. Seeds may survive in the soil for up to 6 years, making eradication extremely difficult if not impossible.

Other common Names:

Chinese tearthumb

MORE INFORMATION:

Mile-a-minute Weed Invasive Species Alert - Printable PDF