Baileya pleniradiata (woolly desert marigold)

Plate 1 figs. a–h · 8 separate observations

Baileya pleniradiata, photographed by Bob Miller — fig. a Bob Miller, CC BY 4.0 / 2020-02-16 / obs. 61760113

Baileya pleniradiata, photographed by Jim Morefield — fig. c Jim Morefield, CC BY 4.0 / obs. 45375857

Baileya pleniradiata, photographed by Jonathan Bright — fig. d Jonathan Bright, CC BY-SA 4.0 / obs. 44496884

Baileya pleniradiata, photographed by Eliseo D Moreno — fig. e Eliseo D Moreno, CC BY-SA 4.0 / obs. 38813253

Baileya pleniradiata, photographed by Ryan Donnelly — fig. f Ryan Donnelly, CC BY 4.0 / obs. 14743115

Baileya pleniradiata, photographed by lemonsnapp — fig. h lemonsnapp, CC BY 4.0 / obs. 20928061

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 5 botanical countries

Native distribution of Baileya pleniradiata, 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
California	CAL
Mexico Northwest	MXN
Nevada	NEV
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 325 in flower of 336 examined

67%

90%

97%

99%

100%

83%

100%

96%

83%

75%

Proportion of examined Baileya pleniradiata in flower, by month
Month	In flower	Examined	Share	95% interval
Jan	4	6	67%	30% to 90%
Feb	9	10	90%	60% to 98%
Mar	37	38	97%	87% to 100%
Apr	87	88	99%	94% to 100%
May	74	74	100%	95% to 100%
Jun	35	35	100%	90% to 100%
Jul	5	6	83%	44% to 97%
Aug	15	15	100%	80% to 100%
Sep	21	21	100%	85% to 100%
Oct	22	23	96%	79% to 99%
Nov	10	12	83%	55% to 95%
Dec	6	8	75%	41% to 93%

Peak flowering in May. Each bar is the share of Baileya pleniradiata 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. 325 of 336 examined observations were in flower, every one of them research grade. The whisker on each bar is a 95% Wilson interval. 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 7 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.

Baileya multiradiata var. perennis (A.Nelson) Kittell
Baileya multiradiata var. pleniradiata (A.Gray) Coville
Baileya nervosa M.E.Jones
Baileya perennis Rydb.
Baileya pleniradiata var. perennis A.Nelson
Baileya pleniradiata var. pleniradiata
Baileya pleniradiata var. thurberi Rydb.

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.