Lobelia urens | BotanAI

Plate 1 figs. a–h · 8 separate observations

Lobelia urens, photographed by Billy Fullwood — fig. a Billy Fullwood, CC BY 4.0 / 2022-04-21 / obs. 189712729

Lobelia urens, photographed by Vicente Lopes — fig. b Vicente Lopes, CC BY 4.0 / obs. 134686733

Lobelia urens, photographed by Donald Davesne — fig. c Donald Davesne, CC BY 4.0 / obs. 96432824

Lobelia urens, photographed by Eric Verna — fig. d Eric Verna, CC BY-SA 4.0 / obs. 51124617

Lobelia urens, photographed by purperlibel — fig. e purperlibel, CC BY-SA 4.0 / obs. 5991079

Lobelia urens, photographed by Roland Godon — fig. g Roland Godon, CC BY 4.0 / obs. 151149967

Lobelia urens, photographed by Ludivine Lamare — fig. h Ludivine Lamare, CC BY 4.0 / obs. 147726711

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

Native distribution of Lobelia urens, 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. Regions too small to draw at this scale are marked with a dot.

Region	TDWG code	Continent
Belgium	BGM	EUROPE
France	FRA
Great Britain	GRB
Portugal	POR
Spain	SPA
Azores	AZO	AFRICA
Madeira	MDR
Morocco	MOR

Not drawn on the map: Great Britain. We hold no public-domain boundary for this region, so it is listed rather than guessed at.

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 210 in flower of 213 examined

100%

96%

98%

100%

Proportion of examined Lobelia urens in flower, by month
Month	In flower	Examined	Share	95% interval
Jan	0	0	too few examined
Feb	0	0	too few examined
Mar	1	1	too few examined
Apr	2	2	too few examined
May	16	16	100%	81% to 100%
Jun	46	48	96%	86% to 99%
Jul	50	51	98%	90% to 100%
Aug	35	35	100%	90% to 100%
Sep	27	27	100%	88% to 100%
Oct	20	20	100%	84% to 100%
Nov	8	8	100%	68% to 100%
Dec	5	5	100%	57% to 100%

Peak flowering in May. Each bar is the share of Lobelia urens 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. 210 of 213 examined observations were in flower, every one of them research grade. The whisker on each bar is a 95% Wilson interval. 4 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 12 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.

Dortmanna urens (L.) Kuntze
Lobelia farsetia Vand.
Lobelia serrulata Schott
Lobelia urens f. angustifolia E.Wimm.
Lobelia urens var. brevibracteata Pérez Lara
Lobelia urens var. integra Chabert
Lobelia urens var. longibracteata Pérez Lara
Lobelia urens var. serrulata (Schott ex Brot.) Steud.
Lobelia verbenifolia Salisb.
Mecoschistum urens (L.) Dulac
Rapuntium serrulatum (Schott ex Brot.) C.Presl
Rapuntium urens (L.) Mill.

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.