Pale smartweed
Persicaria lapathifolia (L.) Delarbre
- light
- —
- water
- —
- tall
- 50 cm
- wide
- —
Polygonaceae
Also called Curlytop Knotweed, Dockweed Smartweed, Pale Willow Weed, Pale Persicaria, White Smartweed
Formerly Dioctis maculatum, Dioctis vernum, Discolenta lapathifolia, Discolenta scabra, and 66 more
When it flowers
Not known yet in the tropics: too few flowering observations to read a season from.
Read from iNaturalist photographs of it in flower. A month counts at 50% of the best month's flowering share (smoothed over three months) and 10% of its flowering count, from at least 100 flowering observations in the band.
If a child, a pet or anyone may have eaten a plant, contact a doctor or vet straight away, or call the National Poisons Information Centre (AIIMS, New Delhi) on 1800 116 117, free and open 24 hours.
Something wrong with it?About it
- Grows as
- AnnualKew's checklist, not yet checked
- Climate
- TemperateKew's checklist, not yet checked
- Wild in
- Subarctic & Temp. Northern Hemisphere to W. & C. Malesia, N. Africa to Ethiopia, N. & E. AustraliaKew's checklist, not yet checked
- Height
- 20 cm to 79 cmRead from Wikipedia, one source
- Flowers
- PinkRead from Wikipedia, one source
Not known yet: light, spread, water, coldest it survives, heat, hottest it survives.
In other languages (12)
- Spanish
- Chilillo blanco, hierba pejiguera, pata de perdiz
- root
- a-chili, PERLAP, Хурганчих тарнагана
- French
- renouée à feuilles de patience, renouée à feuilles d'oseille, renouée noueuse
- Chinese
- 酸模葉蓼, 大馬蓼, 早苗蓼
- Hebrew
- בת-ארכובית הכתמים
- Korean
- 흰여뀌
- Finnish
- ukontatar, rantaukontatar
- German
- Ampfer-Knöterich, Gewöhnlicher Ampfer-Knöterich
- Czech
- rdesno blešník, rdesno blešník pravé
- Dutch
- Beklierde duizendknoop, Bleek knoopkruid, Knopige duizendknoop
- Russian
- Горец развесистый
- Norwegian Bokmål
- kjertelhønsegras
Where this comes from
- iNaturalist, read 2026-10-25, CC0-1.0 (observation counts)
- Wikidata, read 2026-10-25, CC0-1.0
- Kew's checklist, read 2026-10-24, CC-BY-4.0
- Wikipedia, read 2026-10-25, fact, cited
- Wikimedia Commons, read 2026-10-25, Public domain
- iNaturalist, read 2026-10-25, CC BY
- iNaturalist, read 2026-10-25, CC BY
- iNaturalist, read 2026-10-25, CC BY
- 3D model: Persicaria lapathifolia (built for Vanagrha) by Vanagrha, own
A fact “checked by a majority of its sources” was settled by a vote of the pages it was read from, not by a person reading it; one marked “one source” rests on that page alone. Anything else not marked checked has not been checked yet. Where nothing is known, the page says so rather than guess.