Agastache urticifolia (nettleleaf giant hyssop)

Plate 1 figs. a–h · 8 separate observations

Agastache urticifolia, photographed by Daniel S. — fig. a Daniel S., CC BY 4.0 / 2021-07-29 / obs. 147204662

Agastache urticifolia, photographed by Zac Peterson — fig. b Zac Peterson, CC BY 4.0 / obs. 159366626

Agastache urticifolia, photographed by Darrin Gobble — fig. c Darrin Gobble, CC BY 4.0 / obs. 138369590

Agastache urticifolia, photographed by Ellyne Geurts — fig. d Ellyne Geurts, CC0 1.0 / obs. 156023294

Agastache urticifolia, photographed by Dominic Gentilcore — fig. e Dominic Gentilcore, CC BY 4.0 / obs. 84226988

Agastache urticifolia, photographed by Steve Woodward — fig. f Steve Woodward, CC0 1.0 / obs. 82231575

Agastache urticifolia, photographed by Frances Oliver — fig. g Frances Oliver, CC BY 4.0 / obs. 81082404

Agastache urticifolia, photographed by Brian Finzel — fig. h Brian Finzel, CC BY-SA 4.0 / obs. 175292538

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 Agastache urticifolia, 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
British Columbia	BRC	NORTHERN AMERICA
California	CAL
Colorado	COL
Montana	MNT
Nevada	NEV
Oregon	ORE
Utah	UTA
Washington	WAS

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 259 in flower of 290 examined

81%

92%

91%

88%

Proportion of examined Agastache urticifolia in flower, by month
Month	In flower	Examined	Share	95% interval
Jan	0	0	too few examined
Feb	0	0	too few examined
Mar	0	0	too few examined
Apr	0	0	too few examined
May	2	4	too few examined
Jun	38	47	81%	67% to 90%
Jul	157	171	92%	87% to 95%
Aug	53	58	91%	81% to 96%
Sep	7	8	88%	53% to 98%
Oct	2	2	too few examined
Nov	0	0	too few examined
Dec	0	0	too few examined

Peak flowering in Jul. Each bar is the share of Agastache urticifolia 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. 259 of 290 examined observations were in flower, every one of them research grade. The whisker on each bar is a 95% Wilson interval. 8 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 4 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.

Agastache glaucifolia A.Heller
Agastache urticifolia var. glaucifolia (A.Heller) Cronquist
Lophanthus urticifolius Benth.
Vleckia urticifolia (Benth.) 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.