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Persicaria in the
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Persicaria orientalis
Persicaria glabra
Persicaria is a
genus of herbaceous
flowering plants in the knotweed family,
Polygonaceae . Plants of the genus are known commonly as knotweeds
[1] : 436 or smartweeds .
[2] It has a
cosmopolitan distribution , with species occurring nearly worldwide.
[2]
[3] The genus was segregated from
Polygonum .
[4]
Persicaria amphibia
Persicaria longiseta
The genus includes annual and perennial herbs with
taproots or fibrous root systems, or with
rhizomes or
stolons . The stems are often erect but may be prostrate along the ground, and some species are
prickly .
[2] The stems are self-supporting or twining and climbing.
[5] The leaves are alternately arranged,
deciduous , and variously shaped. The brownish or reddish
ochrea may be leathery to papery. The
inflorescence may be a
panicle or a spikelike or headlike arrangement of
fascicles of flowers. The flower is white, greenish, reddish, or purple, with the
tepals partially fused together along the bases. The fruit is an
achene which can take a number of shapes, including a disc or a sphere.
[2]
There are about 66,
[6] 100
[2] to 150 species
[3]
[7] in this genus, depending on how it is defined.
[4]
Species names include:
[2]
[3]
[6]
[8]
[9]
Persicaria acuminata (Kunth) M. Gómez
Persicaria alpina – alpine knotweed
Persicaria amphibia (syn. Polygonum amphibium ) – amphibious bistort, water smartweed
Persicaria amplexicaulis (syn. Polygonum amplexicaule ) – mountain fleece, red bistort
Persicaria arcuata (Greene) Greene
Persicaria arifolia – halberd-leaf tearthumb
Persicaria attenuata (R.Br.) Sojak
Persicaria barbata (L.) H.Hara
Persicaria bicornis – pink smartweed
Persicaria bistorta (syn. Polygonum bistorta ) – common bistort
Persicaria bungeana – prickly smartweed
Persicaria caespitosa (Blume) Nakai
Persicaria campanulata (syn. Polygonum campanulatum ) – lesser knotweed
Persicaria capitata (syn. Polygonum capitatum ) – pink-head knotweed, Japanese knotweed
Persicaria chinensis – Chinese knotweed
Persicaria cliopolitana (Hance) Yonekura & H. Ohashi
Persicaria decipiens – slender knotweed, willow-weed
Persicaria dichotoma
Persicaria dubia (Stein ex A. Br.) Fourr.
Persicaria extremiorientalis
Persicaria ferruginea (Wedd.) Soják
Persicaria foliosa (H. Lindb.) Kitag.
Persicaria glabra – smooth smartweed
Persicaria glandulopilosa (De Wild.) Soják
Persicaria glomerata (Dammer) S.Ortiz & Paiva
Persicaria hirsuta – hairy smartweed
Persicaria hispida (Kunth) M.Gómez
Persicaria hybrida (Chaub.) Soják
Persicaria hydropiper (syn. Polygonum hydropiper ) – water-pepper, marsh-pepper smartweed
Persicaria hydropiperoides – swamp smartweed, mild water-pepper
Persicaria hystricula (J.Schust.) Soják
Persicaria lanigera (R.Br.) Soják
Persicaria lapathifolia (syn. Polygonum lapathifolium ) – pale persicaria
Persicaria laxmannii (Lepech.) H. Gross
Persicaria limbata (Meisn.) H. Hara
Persicaria longiseta (syn. Polygonum longisetum ) – bristly lady's thumb
Persicaria maculata (Raf.) Gray
Persicaria maculosa (syn. Polygonum persicaria ) – Jesusplant, spotted lady's thumb, redshank
Persicaria madagascariensis (Meisn.) S. Ortiz & Paiva
Persicaria meisneriana – Mexican tearthumb
Persicaria minor (syn. Polygonum minus ) – small water-pepper
Persicaria mitis (syn. Polygonum mite )
Persicaria mollis (D. Don) H. Gross is a synonym of Polygonum molle D. Don
Persicaria nepalensis (syn. Polygonum nepalense ) – Nepal knotweed
Persicaria nogueirae S.Ortiz & Paiva
Persicaria obtusifolia (Täckh. & Boulos) Greuter & Burdet
Persicaria odorata is unresolved, but may be synonymous with Polygonum odoratum Lour. – Vietnamese coriander
Persicaria orientalis (syn. Polygonum orientale ) – kiss-me-over-the-garden-gate, prince's feather, princess-feather
Persicaria paraguayensis (Wedd.) S.T. Kim & Donoghue
Persicaria pensylvanica (syn. Polygonum pensylvanicum ) – Pennsylvania smartweed
Persicaria poiretii (Meisn.) K.L. Wilson
Persicaria pulchra (Blume) Soják
Persicaria punctata (syn. Polygonum punctatum ) – dotted knotweed
Persicaria robustior – stout smartweed
Persicaria sagittata (syn. Polygonum sagittatum ) – American tearthumb, arrowleaf tearthumb, arrowvine
Persicaria segetum (Kunth) Small
Persicaria senegalensis
Persicaria setacea – bog smartweed
Persicaria setosula (A. Rich.) K.L. Wilson
Persicaria sinuata (Royle ex Bab.) Rajbh. & R. Joshi
Persicaria stagnina (Buch.-Ham. ex Meisn.) Qaiser
Persicaria strigosa – spotted knotweed
Persicaria tenella (Blume) H. Hara
Persicaria tinctoria (Polygonum tinctorium ) – Chinese indigo, polygonum-indigo
Persicaria virginiana (Polygonum virginianum ) – jumpseed
Persicaria vivipara (L.) Ronse Decr.
Persicaria wallichii (Polygonum wallichii ) – Himalayan knotweed, Kashmir plume
Persicaria weyrichii (F. Schmidt) H. Gross