Petunia integrifolia (Violet-flower petunia)

Plate 1 figs. a–h · 8 separate observations

Petunia integrifolia, photographed by Bahiano Ayala — fig. a Bahiano Ayala, CC BY 4.0 / 2022-03-11 / obs. 188740410

Petunia integrifolia, photographed by Diego Dos Anjos Souza — fig. b Diego Dos Anjos Souza, CC BY 4.0 / obs. 179493299

Petunia integrifolia, photographed by María Zeta — fig. c María Zeta, CC BY 4.0 / obs. 165517182

Petunia integrifolia, photographed by demianlescano — fig. f demianlescano, CC0 1.0 / obs. 67241941

Petunia integrifolia, photographed by Patricio Cowper Coles — fig. g Patricio Cowper Coles, CC BY 4.0 / obs. 151908486

Petunia integrifolia, photographed by Nicolas Olejnik — fig. h Nicolas Olejnik, CC BY 4.0 / obs. 2728944

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 4 botanical countries

Native distribution of Petunia integrifolia, 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
Argentina Northeast	AGE	SOUTHERN AMERICA
Brazil South	BZS
Paraguay	PAR
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 41 in flower of 41 examined

100%

Proportion of examined Petunia integrifolia in flower, by month
Month	In flower	Examined	Share	95% interval
Jan	4	4	too few examined
Feb	3	3	too few examined
Mar	1	1	too few examined
Apr	0	0	too few examined
May	0	0	too few examined
Jun	0	0	too few examined
Jul	2	2	too few examined
Aug	4	4	too few examined
Sep	11	11	100%	74% to 100%
Oct	8	8	100%	68% to 100%
Nov	6	6	100%	61% to 100%
Dec	2	2	too few examined

Peak flowering in Sep. Each bar is the share of Petunia integrifolia 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. 41 of 41 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 18 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.

Nicotiana violacea (Lindl.) E.H.L.Krause
Nierembergia phoenicea G.Don
Nierembergia punicea hort. ex Dunal
Petunia dichotoma Sendtn.
Petunia integrifolia subsp. integrifolia
Petunia integrifolia var. depauperata (R.E.Fr.) L.B.Sm. & Downs
Petunia integrifolia var. integrifolia
Petunia littoralis (Reitz) L.B.Sm. & Downs
Petunia odorata Raf.
Petunia riograndensis T.Ando & Hashim.
Petunia violacea Lindl.
Petunia violacea subsp. depauperata R.E.Fr.
Salpiglossis integrifolia Lodd.
Salpiglossis integrifolia Hook.
Stimoryne integrifolia (Hook.) Wijsman
Stimoryne integrifolia subsp. integrifolia
Stimoryne littoralis (L.B.Sm. & Downs) Wijsman
Stimoryne purpurea Raf.

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.