Flaveria bidentis (coastal plain yellowtops)

Plate 1 figs. a–h · 8 separate observations

Flaveria bidentis, photographed by Bahiano Ayala — fig. a Bahiano Ayala, CC BY 4.0 / 2022-04-30 / obs. 192652874

Flaveria bidentis, photographed by Eduardo Luis Beltrocco — fig. b Eduardo Luis Beltrocco, CC BY 4.0 / obs. 195913275

Flaveria bidentis, photographed by Nicola van Berkel — fig. e Nicola van Berkel, CC BY-SA 4.0 / obs. 202682233

Flaveria bidentis, photographed by aacocucci — fig. f aacocucci, CC BY 4.0 / obs. 182911677

Flaveria bidentis, photographed by Matthew Fainman — fig. g Matthew Fainman, CC BY 4.0 / obs. 124530219

Flaveria bidentis, photographed by Hildegard Klein — fig. h Hildegard Klein, CC BY 4.0 / obs. 122053618

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 15 botanical countries

Native distribution of Flaveria bidentis, 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
Argentina Northeast	AGE	SOUTHERN AMERICA
Argentina Northwest	AGW
Argentina South	AGS
Bahamas	BAH
Bolivia	BOL
Brazil West-Central	BZC
Chile Central	CLC
Chile North	CLN
Dominican Republic	DOM
Ecuador	ECU
Galápagos	GAL
Paraguay	PAR
Peru	PER
Puerto Rico	PUE
Uruguay	URU

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 58 in flower of 63 examined

100%

95%

89%

Proportion of examined Flaveria bidentis in flower, by month
Month	In flower	Examined	Share	95% interval
Jan	3	4	too few examined
Feb	6	6	100%	61% to 100%
Mar	12	12	100%	76% to 100%
Apr	19	20	95%	76% to 99%
May	8	9	89%	56% to 98%
Jun	4	4	too few examined
Jul	1	1	too few examined
Aug	1	1	too few examined
Sep	2	2	too few examined
Oct	1	2	too few examined
Nov	1	1	too few examined
Dec	0	1	too few examined

Peak flowering in Feb. Each bar is the share of Flaveria bidentis 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. 58 of 63 examined observations were in flower, every one of them research grade. The whisker on each bar is a 95% Wilson interval. 8 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.

Anacyclus alexandrinus Willd.
Anthemis arabica Viv.
Anthemis arabica Velen.
Ethulia bidentis L.
Flaveria bidentis B.L.Rob.
Flaveria bidentis (L.) M.R.Almeida
Flaveria bidentis f. bidentis
Flaveria bidentis var. bidentis
Flaveria bonariensis DC.
Flaveria capitata Juss. ex Sm.
Flaveria capitata Juss.
Flaveria chilensis Juss.
Flaveria chilensis J.F.Gmel.
Flaveria chilensis J.F.Gmel.
Flaveria contrayerba Pers.
Flaveria contrayerba var. contrayerba
Milleria chiloensis R. & P. ex Juss.
Milleria contrahierba Lam.
Milleria contrayerba Cav.
Tanacetum monanthos L.
Vermifuga corumbosa Ruiz & Pav.
Vermifuga corymbosa Ruiz & Pav.

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.