Chaptalia tomentosa (woolly sunbonnets)

Plate 1 figs. a–h · 8 separate observations

Chaptalia tomentosa, photographed by Jay Horn — fig. a Jay Horn, CC BY 4.0 / 2022-05-11 / obs. 196865511

Chaptalia tomentosa, photographed by runcator — fig. b runcator, CC BY 4.0 / obs. 187122533

Chaptalia tomentosa, photographed by Ryan Watson — fig. c Ryan Watson, CC BY 4.0 / obs. 186292515

Chaptalia tomentosa, photographed by Lauren McLaurin — fig. d Lauren McLaurin, CC BY 4.0 / obs. 182567566

Chaptalia tomentosa, photographed by Kim — fig. e Kim, CC BY 4.0 / obs. 181954383

Chaptalia tomentosa, photographed by José Garrido — fig. f José Garrido, CC BY 4.0 / obs. 181512567

Chaptalia tomentosa, photographed by saltyhiker — fig. h saltyhiker, CC BY 4.0 / obs. 182491481

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 10 botanical countries

Native distribution of Chaptalia tomentosa, 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
Alabama	ALA	NORTHERN AMERICA
Florida	FLA
Georgia	GEO
Louisiana	LOU
Mississippi	MSI
North Carolina	NCA
South Carolina	SCA
Texas	TEX
Dominican Republic	DOM	SOUTHERN AMERICA
Haiti	HAI

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 622 in flower of 702 examined

94%

92%

94%

88%

53%

40%

78%

92%

Proportion of examined Chaptalia tomentosa in flower, by month
Month	In flower	Examined	Share	95% interval
Jan	49	52	94%	84% to 98%
Feb	176	192	92%	87% to 95%
Mar	256	272	94%	91% to 96%
Apr	90	102	88%	81% to 93%
May	16	30	53%	36% to 70%
Jun	6	15	40%	20% to 64%
Jul	0	3	too few examined
Aug	0	0	too few examined
Sep	0	2	too few examined
Oct	0	1	too few examined
Nov	7	9	78%	45% to 94%
Dec	22	24	92%	74% to 98%

Peak flowering in Jan. Each bar is the share of Chaptalia tomentosa 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. 622 of 702 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 6 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.

Chaptalia integrifolia (Michx.) Nutt.
Chaptalia integrifolia var. integrifolia
Chaptalia semifloscularis (Walter) B.L.Rob.
Gerbera walteri Sch.Bip.
Thyrsanthema semiflosculare (Walter) Kuntze
Tussilago integrifolia Michx.

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.
Wikidata. common name (P1843), joined on the World Flora Online identifier (P7715). CC0. Retrieved 2026-07-13.
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.