Persicaria attenuata(R.Br.) Soják

Smart Weed

WFO wfo-0001250565 Accepted WFO 2026-06 8 photographs CC BY-SA

Plate 1 figs. a–h · 8 separate observations

Persicaria attenuata, photographed by Greg Tasney
fig. a Greg Tasney, CC BY-SA 4.0 / 2022-02-19 / obs. 180051722
Persicaria attenuata, photographed by Greg Tasney
fig. b Greg Tasney, CC BY-SA 4.0 / obs. 177073801
Persicaria attenuata, photographed by Greg Tasney
fig. c Greg Tasney, CC BY-SA 4.0 / obs. 172556266
Persicaria attenuata, photographed by Greg Tasney
fig. d Greg Tasney, CC BY-SA 4.0 / obs. 168613123
Persicaria attenuata, photographed by Greg Tasney
fig. e Greg Tasney, CC BY-SA 4.0 / obs. 168612702
Persicaria attenuata, photographed by Greg Tasney
fig. f Greg Tasney, CC BY-SA 4.0 / obs. 162594561
Persicaria attenuata, photographed by Greg Tasney
fig. g Greg Tasney, CC BY-SA 4.0 / obs. 158708495
Persicaria attenuata, photographed by Greg Tasney
fig. h Greg Tasney, CC BY-SA 4.0 / obs. 156602268

Every figure is a research-grade observation under CC0, CC BY or CC BY-SA, rehosted with the photographer’s name, the licence and the observation it came from. Photographs under a NonCommercial licence are excluded from this site and are never stored, which costs us a great many pictures and is not negotiable.

Native range 8 botanical countries

Regions where Persicaria attenuata is native: Lesser Sunda Is., New Guinea, New South Wales, Northern Territory, Queensland, South Australia, Victoria, Western Australia Lesser Sunda Is.New GuineaNew South WalesNorthern TerritoryQueenslandSouth AustraliaVictoriaWestern Australia
Native distribution of Persicaria attenuata, after Kew’s World Checklist of Vascular Plants. Introduced, extinct and doubtful records are excluded, so this is where the plant is from, not everywhere it now grows.
RegionTDWG codeContinent
New South Wales NSW AUSTRALASIA
Northern Territory NTA
Queensland QLD
South Australia SOA
Victoria VIC
Western Australia WAU
Lesser Sunda Is. LSI ASIA-TROPICAL
New Guinea NWG

Region boundaries approximated from Natural Earth (public domain) and mapped to TDWG World Geographical Scheme for Recording Plant Distributions (WGSRPD) level-3 botanical countries (Brummitt 2001). Indicative, not the official WGSRPD geometry.

Flowering 300 in flower of 328 examined

Peak flowering in Aug. Each bar is the share of Persicaria attenuata observations in which someone actually recorded the reproductive state and found the plant in flower, not the raw number of flowering records. That distinction matters: people observe plants far more in spring than in winter, so a bare count of flowering records partly measures when people go outside. Dividing by the number examined removes that. 300 of 328 examined observations were in flower, every one of them research grade. The whisker on each bar is a 95% Wilson interval. This is still a global aggregate and not a forecast for your garden: the same species flowers on different dates in different hemispheres. Where a species has fewer than 30 flowering records we do not draw this chart at all. Computed from 10.15468/dl.cgje2x.

Also published as 1 synonym

A synonym is not an error. It is a record of botanists disagreeing, in print, about where this plant belongs. Each of these was somebody’s considered answer.

  • Polygonum attenuatum R.Br.

Sourcesevery claim on this page

  1. World Flora Online Plant List. accepted name, authority, classification. CC0. Retrieved 2026-07-12.
  2. iNaturalist. photographs and flowering annotations, CC0 / CC BY / CC BY-SA only. per photograph. Retrieved 2026-06-27.
  3. Wikidata. common name (P1843), joined on the World Flora Online identifier (P7715). CC0. Retrieved 2026-07-13.
  4. Kew, World Checklist of Vascular Plants (WCVP v16). native distribution by TDWG level-3 botanical country, and life form. CC BY 3.0. Retrieved 2026-06-04.

We publish what we can source and we say so when we cannot. This page has no care advice and no toxicity claim, because we do not yet have those from a source we can cite.