Lythrum alatum (Winged Loosestrife)

Plate 1 figs. a–h

Lythrum alatum, photographed by evangrimes — fig. a evangrimes, CC BY 4.0 / 2021-08-20 / obs. 152053036

Lythrum alatum, photographed by Ryan Sorrells — fig. b Ryan Sorrells, CC BY 4.0 / obs. 153597933

Lythrum alatum, photographed by Lynn Harper — fig. d Lynn Harper, CC0 1.0 / obs. 151407795

Lythrum alatum, photographed by Liliana Ramírez-Freire — fig. e Liliana Ramírez-Freire, CC BY 4.0 / obs. 194577017

Lythrum alatum, photographed by brybrysciguy — fig. f brybrysciguy, CC BY 4.0 / obs. 146604216

Lythrum alatum, photographed by geosesarma — fig. g geosesarma, CC BY 4.0 / obs. 150713805

Lythrum alatum, photographed by Sam Kieschnick — fig. h Sam Kieschnick, CC BY 4.0 / obs. 147341759

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.

Flowering n = 741 observations

205

283

127

Flowering observations of Lythrum alatum by month
Month	Observations
Jan	0
Feb	2
Mar	3
Apr	10
May	62
Jun	205
Jul	283
Aug	127
Sep	44
Oct	5
Nov	0
Dec	0

Peak flowering in Jul, from 741 community-annotated observations worldwide. This is a global aggregate, not a forecast for your garden: the same species flowers on different dates in different hemispheres, and citizen-science records cluster near cities, at weekends, and in spring. Where a species has fewer than 30 annotated records we do not draw this chart at all.

Also published as 11 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.

Lythrum alatum subsp. lanceolatum (Elliott) A.Haines
Lythrum dacotanum Nieuwl.
Lythrum hyssopifolia var. virgultosum DC.
Lythrum hyssopifolium M.A.Curtis
Lythrum lanceolatum Elliott
Lythrum lineare Hook. & Arn.
Lythrum lineare Bertero ex DC.
Lythrum satureifolium DC.
Lythrum virginicum J.Kenn. ex DC.
Pythagorea alata (Pursh) Raf.
Salicaria alata (Pursh) Lunell

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.

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