Persicaria amplexicaulis

Plate 1 figs. a–h · 8 separate observations

Persicaria amplexicaulis, photographed by Stephen James McWilliam — fig. b Stephen James McWilliam, CC0 1.0 / obs. 162857062

Persicaria amplexicaulis, photographed by Susan Marley — fig. c Susan Marley, CC BY 4.0 / obs. 97344631

Persicaria amplexicaulis, photographed by Maxim Shashkov — fig. f Maxim Shashkov, CC BY 4.0 / obs. 55098085

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 9 botanical countries

Native distribution of Persicaria amplexicaulis, 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.

Region	TDWG code	Continent
Afghanistan	AFG	ASIA-TEMPERATE
China North-Central	CHN
China South-Central	CHC
China Southeast	CHS
Tibet	CHT
East Himalaya	EHM	ASIA-TROPICAL
Nepal	NEP
Pakistan	PAK
West Himalaya	WHM

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 86 in flower of 89 examined

88%

100%

Proportion of examined Persicaria amplexicaulis in flower, by month
Month	In flower	Examined	Share	95% interval
Jan	0	0	too few examined
Feb	0	0	too few examined
Mar	0	0	too few examined
Apr	0	0	too few examined
May	1	1	too few examined
Jun	2	3	too few examined
Jul	14	16	88%	64% to 97%
Aug	34	34	100%	90% to 100%
Sep	18	18	100%	82% to 100%
Oct	13	13	100%	77% to 100%
Nov	4	4	too few examined
Dec	0	0	too few examined

Peak flowering in Aug. Each bar is the share of Persicaria amplexicaulis 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. 86 of 89 examined observations were in flower, every one of them research grade. The whisker on each bar is a 95% Wilson interval. 8 months have fewer than 5 examined observations, so no proportion is drawn for them. 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 14 synonyms

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.

Bistorta amplexicaulis (D.Don) Greene
Bistorta amplexicaulis subsp. sinensis (F.B.Forbes & Hemsl.) Soják
Bistorta amplexicaulis subsp. sinomontana (Sam.) Yonek. & H.Ohashi
Bistorta amplexicaulis var. alba Munshi & Javeid
Bistorta amplexicaulis var. amplexicaulis
Bistorta amplexicaulis var. dhorpatanensis Yonek. & H.Ohashi
Bistorta amplexicaulis var. pendula H.Hara
Bistorta henryi Yonek. & H.Ohashi
Bistorta oxyphylla (Wall. ex Meisn.) Greene
Bistorta petiolata Petrov
Bistorta sinomontana (Sam.) Miyam.
Bistorta sinomontana var. pubifolia Miyam. & H.Ohba
Bistorta speciosa (Hook.f.) Greene
Polygonum amplexicaule D.Don

Sourcesevery claim on this page

World Flora Online Plant List. accepted name, authority, classification. CC0. Retrieved 2026-07-12.
iNaturalist. photographs and flowering annotations, CC0 / CC BY / CC BY-SA only. per photograph. Retrieved 2026-06-27.
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.