Agave utahensis (Utah agave)

Plate 1 figs. a–h · 8 separate observations

Agave utahensis, photographed by Tom and T Herman — fig. a Tom and T Herman, CC BY 4.0 / 2022-03-18 / obs. 183483690

Agave utahensis, photographed by Noel — fig. b Noel, CC0 1.0 / obs. 175772880

Agave utahensis, photographed by CK2AZ — fig. c CK2AZ, CC BY 4.0 / obs. 163512162

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 Agave utahensis, 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
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 56 in flower of 251 examined

11%

47%

50%

21%

25%

Proportion of examined Agave utahensis in flower, by month
Month	In flower	Examined	Share	95% interval
Jan	2	19	11%	3% to 31%
Feb	0	16	0%	0% to 19%
Mar	1	15	7%	1% to 30%
Apr	1	41	2%	0% to 13%
May	28	60	47%	35% to 59%
Jun	14	28	50%	33% to 67%
Jul	3	14	21%	8% to 48%
Aug	2	8	25%	7% to 59%
Sep	1	20	5%	1% to 24%
Oct	4	16	25%	10% to 50%
Nov	0	5	0%	0% to 43%
Dec	0	9	0%	0% to 30%

Peak flowering in Jun. Each bar is the share of Agave utahensis 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. 56 of 251 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 11 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.

Agave eborispina Hester
Agave haynaldii var. utahensis (Engelm.) N.Terracc.
Agave kaibabensis McKelvey
Agave nevadensis (Engelm. ex Greenm. & Roush) Hester
Agave newberryi Engelm.
Agave newberyi Engelm.
Agave scaphoidea Greenm. & Ronst.
Agave utahensis var. discreta M.E.Jones
Agave utahensis var. kaibabensis (McKelvey) Breitung
Agave utahensis var. scaphoidea M.E.Jones
Agave utahensis var. utahensis

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.