Acourtia wrightii (brownfoot)

Plate 1 figs. a–h · 8 separate observations

Acourtia wrightii, photographed by Michelle W. （鍾偉瑋） — fig. a Michelle W. （鍾偉瑋）, CC BY 4.0 / 2022-06-05 / obs. 204505132

Acourtia wrightii, photographed by Jared Shorma — fig. b Jared Shorma, CC BY 4.0 / obs. 174900045

Acourtia wrightii, photographed by Craig Martin — fig. d Craig Martin, CC0 1.0 / obs. 155262807

Acourtia wrightii, photographed by Leticia Jiménez Hernández — fig. e Leticia Jiménez Hernández, CC BY-SA 4.0 / obs. 154297480

Acourtia wrightii, photographed by Nolan Exe — fig. f Nolan Exe, CC BY 4.0 / obs. 129459959

Acourtia wrightii, photographed by Robert Webster — fig. g Robert Webster, CC BY-SA 4.0 / obs. 119445687

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 Acourtia wrightii, 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
Arizona	ARI	NORTHERN AMERICA
Mexico Northeast	MXE
Mexico Northwest	MXN
Mexico Southwest	MXS
Nevada	NEV
New Mexico	NWM
Texas	TEX
Utah	UTA

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 174 in flower of 249 examined

33%

30%

63%

87%

53%

88%

84%

75%

81%

44%

56%

Proportion of examined Acourtia wrightii in flower, by month
Month	In flower	Examined	Share	95% interval
Jan	3	9	33%	12% to 65%
Feb	1	4	too few examined
Mar	3	10	30%	11% to 60%
Apr	15	24	63%	43% to 79%
May	47	54	87%	76% to 94%
Jun	10	19	53%	32% to 73%
Jul	14	16	88%	64% to 97%
Aug	26	31	84%	67% to 93%
Sep	12	16	75%	51% to 90%
Oct	26	32	81%	65% to 91%
Nov	7	16	44%	23% to 67%
Dec	10	18	56%	34% to 75%

Peak flowering in Jul. Each bar is the share of Acourtia wrightii 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. 174 of 249 examined observations were in flower, every one of them research grade. The whisker on each bar is a 95% Wilson interval. One month has fewer than 5 examined observations, so no proportion is drawn for it. 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.

Where it actually grows measured, from 1,019 observations

Condition	5th percentile	Median	95th percentile
Coldest month, mean daily low	-1.7 °C	2.3 °C	6.2 °C
Warmest month, mean daily high	30.2 °C	35.2 °C	39.1 °C
Annual rainfall	235 mm	378 mm	638 mm
Rainfall in the driest quarter	14 mm	28 mm	78 mm

It is found where winters bring light frost. This is not care advice and it is not a forecast. It is a measurement: we sampled the climate at every one of the 1,019 research-grade observations of Acourtia wrightii that carry a coordinate, and this is the range those places actually span. The 5th and 95th percentiles are used rather than the minimum and maximum, because a single cultivated specimen in a heated conservatory should not widen a tropical plant's range to the Arctic.

This is not a hardiness zone. A USDA zone is the average annual extreme minimum temperature. The figure above is the mean daily minimum of the coldest month, which is a different quantity and is typically far warmer. Reading one as the other would place a plant several zones too warm, so we do not publish a hardiness zone, because we do not have one. Climate from CHELSA V2.1 (Karger et al. 2017); occurrences from 10.15468/dl.cgje2x.

Also published as 5 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.

Perezia arizonica A.Gray
Perezia schaffneri Gray
Perezia wrightii A.Gray
Perezia wrightii var. arizonica M.E.Jones
Perezia wrightii var. wrightii

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.