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Persicaria is a genus of herbaceous flowering plants in the knotweed family, Polygonaceae. Plants of the genus are known commonly as knotweeds [ 2 ] : 436 or smartweeds . [ 3 ] It has a cosmopolitan distribution , with species occurring nearly worldwide.
Persicaria pensylvanica (syn. Polygonum pensylvanicum [1]) is a species of flowering plant in the buckwheat family, Polygonaceae. It is native to parts of North America, where it is widespread in Canada and the United States. [2] It has also been noted as an introduced species in parts of Europe and South America. [3]
Persicaria maculosa (syn. Polygonum persicaria) is an annual plant in the buckwheat family, Polygonaceae. Common names include lady's thumb, [4] spotted lady's thumb, Jesusplant, and redshank. [5] [6] It is widespread across Eurasia from Iceland south to Portugal and east to Japan.
Persicaria posumbu is a species of flowering plant in the family Polygonaceae. [1] It was first described as Polygonum posumbu in 1825 and transferred to the genus Persicaria in 1919. [ 2 ] Plants of the World Online records it as having a discontinuous native distribution: the Assam region , Bangladesh and the eastern Himalayas to the west ...
Polygonum plebeium or small knotweed The last comprehensive revision of the family was published in 1993 by John Brandbyge as part of The Families and Genera of Vascular Plants . [ 7 ] Brandbyge followed earlier systems of plant classification in dividing Polygonaceae into two subfamilies , Eriogonoideae and Polygonoideae .
Polygonum salicifolium Schur 1866 not Brouss. ex Willd. 1809 Persicaria amphibia ( syn. Polygonum amphibium ) is a species of flowering plant in the knotweed family known by several common names, including longroot smartweed , water knotweed , water smartweed , and amphibious bistort .
Persicaria lapathifolia (syn. Polygonum lapathifolium), known as pale persicaria, [2] is a plant of the family Polygonaceae. It is considered to be native throughout most of the world, from arctic to tropical realms, except South America and Southern Africa. [ 3 ]
Bistorta macrophylla (syn. Polygonum macrophyllum, syn. Persicaria macrophylla) is a flowering plant species in the buckwheat family Polygonaceae. [1] It is native to mountain regions of West and South China (Gansu, Guizhou, Henan, Hubei, Qinghai, Shaanxi, Sichuan, Tibet, Yunnan), Bhutan, Nepal, [2] northern India (Himachal Pradesh, Uttarakhand), and Pakistan.