Bartlettina sordida

Plate 1 figs. a–h · 8 separate observations

Bartlettina sordida, photographed by Bruce Calvert — fig. b Bruce Calvert, CC BY 4.0 / obs. 5164195

Bartlettina sordida, photographed by Colin Meurk — fig. c Colin Meurk, CC BY-SA 4.0 / obs. 3416195

Bartlettina sordida, photographed by botanygirl — fig. d botanygirl, CC BY 4.0 / obs. 3147343

Bartlettina sordida, photographed by Neptalí Ramírez Marcial — fig. e Neptalí Ramírez Marcial, CC BY 4.0 / obs. 1660329

Bartlettina sordida, photographed by Tereso Hernández Morales — fig. f Tereso Hernández Morales, CC BY 4.0 / obs. 196768179

Bartlettina sordida, photographed by Jacqui Geux — fig. h Jacqui Geux, CC BY 4.0 / obs. 63071265

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 6 botanical countries

Native distribution of Bartlettina sordida, 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
Mexico Central	MXC	NORTHERN AMERICA
Mexico Gulf	MXG
Mexico Northeast	MXE
Mexico Southeast	MXT
Mexico Southwest	MXS
Guatemala	GUA	SOUTHERN AMERICA

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 53 in flower of 61 examined

92%

90%

Proportion of examined Bartlettina sordida in flower, by month
Month	In flower	Examined	Share	95% interval
Jan	2	3	too few examined
Feb	4	4	too few examined
Mar	11	12	92%	65% to 99%
Apr	3	3	too few examined
May	0	2	too few examined
Jun	1	1	too few examined
Jul	0	0	too few examined
Aug	0	0	too few examined
Sep	1	2	too few examined
Oct	22	24	92%	74% to 98%
Nov	9	10	90%	60% to 98%
Dec	0	0	too few examined

Peak flowering in Mar. Each bar is the share of Bartlettina sordida 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. 53 of 61 examined observations were in flower, every one of them research grade. The whisker on each bar is a 95% Wilson interval. 9 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 22 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.

Eupatorium atrorubens (Lem.) N.E.Br.
Eupatorium grandiflorum André
Eupatorium ianthinum (Morren) Hemsl.
Eupatorium ianthinum (Hook.) Hemsley
Eupatorium megalophyllum (Lem.) N.E.Br.
Eupatorium megalophyllum Klatt
Eupatorium panamense (Carrière) N.E.Br.
Eupatorium petasites Griseb.
Eupatorium raffillii Hemsl.
Eupatorium raffillii Hemsley
Eupatorium septuplinervium Klatt
Eupatorium sordidum Less.
Eupatorium sordidum var. atrorubens (Lem.) Miranda
Eupatorium sordidum var. sordidum
Hebeclinium atrorubens Lem.
Hebeclinium atrorubens Lemaire
Hebeclinium ianthinum Hook.
Hebeclinium megalophyllum Lem.
Hebeclinium megalophyllum Lemaire
Hebeclinium panamense Carrière
Hebeclinium sordidum Sch.Bip. ex J.Kost.
Neobartlettia sordida (Less.) R.M.King & H.Rob.

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.