Polygonaceae

Curlytop knotweed

Persicaria lapathifolia (L.) Delarbre

Family: Polygonaceae
Genus: Persicaria

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Curlytop knotweed (Persicaria lapathifolia) — FlowerPhoto: Tom Scavo, CC BY 4.0, from iNaturalist

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Common names

By language (33)

Arabic: الغدار, الزباء, عصا الراعي, قردب المناقع, غدار
arz: بيرسيكاريا لاباثيفوليا
Azerbaijani: Kələkötür qırxbuğum
Belarusian: Драсён раскідзісты, Дзердзец, Драсён вузлаваты, Драсён шурпаты, Драсён ільняны, Дрост, Дрост белы
Bulgarian: Лапатолистно пипериче
Catalan: Herba presseguera lapatifòlia
Chinese: 早苗蓼, 酸模叶蓼, 酸模葉蓼, 糙葉蓼, 绵毛酸模叶蓼, 糙叶蓼, 小早苗蓼, 柳叶蓼
Croatian: Kiseličasti dvornik
Czech: Rdesno blešník
Dutch: Beklierde duizendknoop, Bleek knoopkruid, Knopige duizendknoop, Oeverduizendknoop
English: Curlytop knotweed, Dock-leaf smartweed, Dock leaved smartweed, Pale persicaria, Pale smartweed, Pink knotweed, Willow weed
Estonian: Kahar kilbirohi
Finnish: Ukontatar, Tulvaukontatar
French: Renouée à feuilles d'oseille, Renouée noueuse, Renouée à feuilles de patience, Renouee a feuilles d'oseille
German: Ampfer-Knöterich
hsb: Zdźerowa wuroć
Icelandic: Lóblaðka
Italian: Poligono nodoso
Japanese: サナエタデ, 早苗蓼, アラゲタデ
Korean: 명아주여뀌
Latvian: Skābeņlapu sūrene
Lithuanian: Trumpamakštis rūgtis
Macedonian: Голема подворка
Norwegian Bokmål: Grønt hønsegress
Polish: Rdest szczawiolistny
Romanian: Iarbă roșie
Russian: Горец развесистый, Горец Комарова, Горец узловатый, Горец щавелелистный, Горлец щавелелистный, Гречиха щавелелистная, Гречишка войлочная, Гречишка щавелелистная
Slovak: Horčiak štiavolistý
Slovenian: Ščavjelistna dresen
Spanish: Hierba pejiguera, Pata de perdiz
Swedish: Pilört, Strandpilört, Vanlig pilört
Ukrainian: Гірчак шорсткий
Welsh: Canwraidd y dom

Synonyms

Dioctis maculatum Raf.
Dioctis vernum Raf.
Discolenta lapathifolia Raf.
Discolenta scabra Raf.
Persicaria attenuata subsp. pulchra (Blume) K.L.Wilson
Persicaria hypanica (Klokov) Tzvelev
Persicaria lapathifolia subsp. andrzejowskiana (Klokov) Soják
Persicaria lapathifolia subsp. brittingeri (Opiz) Soják
Persicaria lapathifolia subsp. hypanica (Klokov) Soják
Persicaria lapathifolia subsp. linicola (Sutulov) Tzvelev
Persicaria lapathifolia subsp. nodosa (Pers.) Á.Löve
Persicaria lapathifolia subsp. pallida (With.) S.Ekman & T.Knutsson
Persicaria lapathifolia subsp. saporoviensis (Klokov) Soják
Persicaria lapathifolia var. incana (Roth) S.Ekman & T.Knutsson
Persicaria lapathifolia var. lapathifolia
Persicaria lapathifolia var. linicola (Sutulov) S.Ekman & T.Knutsson
Persicaria lapathifolia var. nodosa (Pers.) Qaiser
Persicaria lapathifolia var. tomentosa (Schrank) Tzvelev
Persicaria linicola Nenukow
Persicaria oneillii Brenckle
Persicaria saporoviensis (Klokov) Tzvelev
Persicaria scabra (Moench) Moldenke
Persicaria scabra var. incana (F.W.Schmidt) Tzvelev
Persicaria tomentosa (Schrank) E.P.Bicknell
Peutalis nodosa (Pers.) Raf.
Polygonum andrzejowskianum Klokov
Polygonum brittingeri Opiz
Polygonum ferrugineum var. patagonicum (Speg.) Macloskie
Polygonum hypanicum Klokov
Polygonum incanum F.W.Schmidt
Polygonum incarnatum Elliott
Polygonum lapathifolium L.
Polygonum lapathifolium f. nodosum (Pers.) Beck
Polygonum lapathifolium var. incanum (F.W.Schmidt) W.D.J.Koch
Polygonum lapathifolium var. incanum Ledeb.
Polygonum lapathifolium var. nodosum (Pers.) Hook.f.
Polygonum lapathifolium var. ovatum A.Br.
Polygonum lapathifolium var. salicifolium Sibth.
Polygonum linicola Sutulov
Polygonum nodosum Pers.

and 12 more.

Flowers

In flower: July to October (from 1,245 flowering iNaturalist observations worldwide)

Photos

FlowerPhoto: Tom Scavo, CC BY 4.0, from iNaturalist
FlowerPhoto: wilderbombyx, CC0, from iNaturalist
FlowerPhoto: Stephen Thorpe, CC BY 4.0, from iNaturalist
FlowerPhoto: Ryan Sorrells, CC BY 4.0, from iNaturalist
Photo: Daniel Atha, CC0, from iNaturalist
Photo: AnRo0002, CC0, from Wikimedia Commons
Photo: simonpesant, CC BY 4.0, from iNaturalist
Photo: AnRo0002, CC0, from Wikimedia Commons
Photo: Ryan Donnelly, CC BY 4.0, from iNaturalist
Photo: AnRo0002, CC0, from Wikimedia Commons
Photo: Paul A Karpinski, CC BY 4.0, from iNaturalist
Photo: AnRo0002, CC0, from Wikimedia Commons

More in Persicaria

Sources: classification, synonyms from World Flora Online Plant List (2026-06, CC0 1.0); common names, popularity from Wikidata (2026-10-26, CC0 1.0). About our plant data.