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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 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.
When the genus is defined narrowly, Polygonum species are annual or perennial herbaceous plants, rarely shrubby, with much branched stems.The leaves are arranged alternately, usually less than 2 cm (0.8 in) long, with a length greater than the width.
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 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]
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 .
Persicaria perfoliata (basionym Polygonum perfoliatum [1]) is a species of flowering plant in the buckwheat family. Common names include mile-a-minute, devil's tail, giant climbing tearthumb, [2] [3] and Asiatic tearthumb. [4] It is a trailing herbaceous annual vine with barbed stems and triangular leaves.
Bistorta officinalis (synonym Persicaria bistorta), known as bistort, common bistort, European bistort, or meadow bistort, is a species of flowering plant in the dock family Polygonaceae native to Europe and northern and western Asia. [1] Other common names include snakeroot, snake-root, snakeweed, and Easter-ledges.