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Persicaria posumbu
Also called Tall Smartweed, Oriental Ladysthumb
Persicaria posumbu is a species of flowering plant in the family Polygonaceae. It was first described as Polygonum posumbu in 1825 and transferred to the genus Persicaria in 1919. Plants of the World Online records it as having a discontinuous native distribution: the Assam region, Bangladesh and the eastern Himalayas to the west, and Japan, Korea, the Kuril Islands and Primorye to the east.
There is some confusion over the relationship between Persicaria posumbu and Persicaria cespitosa. Some sources regard P. cespitosa as an independent species, others regard P. cespitosa as a synonym of P. posumbu.
Amphibious Bistort · Halberdleaf tearthumb · Smart Weed · Bearded Knotweed · Two-horned smartweed · Prickly Smartweed · Pink Headed Knotweed · Persicaria cespitosa · Chinese Knotweed · Slender Knotweed · Persicaria dichotoma · Tall Knotweed
Text excerpted from the Wikipedia article Persicaria posumbu by its contributors, under CC BY-SA 4.0; the excerpts are shared under the same licence.
Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.
