Persicaria extremiorientalis (Vorosch.) Tzvelev.

Locations ofPersicaria extremiorientalis (Vorosch.) Tzvelev. in Virginia

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Detail

Family
Polygonaceae
Botanical Name
Persicaria extremiorientalis (Vorosch.) Tzvelev.
Common Name
East Asian Smartweed
Synonym(s)
Flora of Virginia Name/Status
in Taxa Not Treated: Waifs
Comments
Reported as established in North America in J. Torr. Bot. Soc. 137(4):333-338 (2010) and first discovered in Virginia by Charlie Davis based on his 2009 collection from Mather Gorge, Fairfax County; more recent specimens from Albemarle, Augusta, Chesterfield, Fluvanna, Frederick, Greene, Hanover, Louisa, and Nelson counties indicate a very rapidly spreading introduction. Additional occurrences will certainly be forthcoming. It is a tall plant (2 m or more in height) resembling P. lapathifolia and P. maculosa, with (in our area) usually sparsely strigose stems, stipitate-glandular peduncles, and purplish, nodding inflorescences.
Habitat
Disturbed alluvium, weedy roadsides, waste places, and mulch beds. There are few records currently, but this weedy species is likely to spread quickly.
Native Status
Introduced

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