Lupinus arizonicus (Arizona lupine)

Plate 1 figs. a–h · 8 separate observations

Lupinus arizonicus, photographed by Diana — fig. a Diana, CC BY 4.0 / 2022-03-18 / obs. 183475892

Lupinus arizonicus, photographed by Bill Levine — fig. b Bill Levine, CC BY 4.0 / obs. 181151692

Lupinus arizonicus, photographed by Henrik Kibak — fig. e Henrik Kibak, CC BY 4.0 / obs. 122954224

Lupinus arizonicus, photographed by Jesse Rorabaugh — fig. f Jesse Rorabaugh, CC0 1.0 / obs. 64259478

Lupinus arizonicus, photographed by Bob Miller — fig. g Bob Miller, CC BY 4.0 / obs. 62274400

Lupinus arizonicus, photographed by P Holroyd — fig. h P Holroyd, CC BY 4.0 / obs. 61476693

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 Lupinus arizonicus, 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

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 2,714 in flower of 2,957 examined

82%

93%

97%

98%

100%

52%

63%

Proportion of examined Lupinus arizonicus in flower, by month
Month	In flower	Examined	Share	95% interval
Jan	309	377	82%	78% to 86%
Feb	755	814	93%	91% to 94%
Mar	1259	1298	97%	96% to 98%
Apr	262	268	98%	95% to 99%
May	20	20	100%	84% to 100%
Jun	0	0	too few examined
Jul	0	0	too few examined
Aug	1	2	too few examined
Sep	0	0	too few examined
Oct	1	2	too few examined
Nov	16	31	52%	35% to 68%
Dec	91	145	63%	55% to 70%

Peak flowering in May. Each bar is the share of Lupinus arizonicus 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. 2,714 of 2,957 examined observations were in flower, every one of them research grade. The whisker on each bar is a 95% Wilson interval. 5 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 10 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.

Lupinus arizonicus var. barbatulus (Thornber) I.M.Johnst.
Lupinus brevior (Jeps.) J.A.Christian & D.B.Dunn
Lupinus concinnus var. arizonicus S.Watson
Lupinus concinnus var. brevior (Jeps.) D.B.Dunn
Lupinus lagunensis M.E.Jones
Lupinus sparsiflorus var. arizonicus (S.Watson) C.P.Sm.
Lupinus sparsiflorus var. barbatulus Thornber
Lupinus sparsiflorus var. brevior Jeps.
Lupinus sparsiflorus var. setosissimus C.P.Sm.
Lupinus subhirsutus Davidson

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.