Sanguinaria canadensis (bloodroot)

Plate 1 figs. a–h

Sanguinaria canadensis, photographed by A.L. — fig. a A.L., CC BY 4.0 / 2022-06-07 / obs. 204453098

Sanguinaria canadensis, photographed by Mark Apgar — fig. b Mark Apgar, CC BY 4.0 / obs. 203638440

Sanguinaria canadensis, photographed by Tom Scavo — fig. c Tom Scavo, CC BY 4.0 / obs. 202908336

Sanguinaria canadensis, photographed by Erin Lalime — fig. d Erin Lalime, CC BY 4.0 / obs. 202069483

Sanguinaria canadensis, photographed by Ava — fig. e Ava, CC0 1.0 / obs. 201669238

Sanguinaria canadensis, photographed by José Garrido — fig. f José Garrido, CC BY 4.0 / obs. 200890464

Sanguinaria canadensis, photographed by Brian Finzel — fig. g Brian Finzel, CC BY-SA 4.0 / obs. 199878943

Sanguinaria canadensis, photographed by Lynn Harper — fig. h Lynn Harper, CC0 1.0 / obs. 201066777

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.

Confused withby our own model

These are not lookalikes we guessed at. Each one is a species our identification model genuinely mistook for this plant, and how many times. The error rate is published.

Jeffersonia diphyllathis one called it 5x compare

Flowering n = 31,035 observations

253

8158

18798

3795

Flowering observations of Sanguinaria canadensis by month
Month	Observations
Jan	3
Feb	253
Mar	8158
Apr	18798
May	3795
Jun	12
Jul	2
Aug	6
Sep	1
Oct	3
Nov	2
Dec	2

Peak flowering in Apr, from 31,035 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 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.

Belharnosia canadensis (L.) Nieuwl.
Belharnosia mesochora (Greene) Lunell
Sanguinaria acaulis Moench
Sanguinaria australis Greene
Sanguinaria canadensis f. canadensis
Sanguinaria canadensis f. multiplex (E.H.Wilson) Weath.
Sanguinaria canadensis var. canadensis
Sanguinaria canadensis var. multiplex E.H.Wilson
Sanguinaria canadensis var. rotundifolia (Greene) Fedde
Sanguinaria dilleniana Greene
Sanguinaria grandiflora M.Roscoe
Sanguinaria mesochora Greene
Sanguinaria rotundifolia Greene
Sanguinaria virginiana Gaertn.

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.