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Classification System: APG IV

Superregnum: Eukaryota
Regnum: Plantae
Cladus: Angiosperms
Cladus: Eudicots
Cladus: Core eudicots
Cladus: Asterids
Cladus: Lamiids
Ordo: Lamiales

Familia: Lamiaceae
Subfamilia: Nepetoideae
Tribus: Mentheae
Subtribus: Nepetinae
Genus: Agastache
Species: Agastache urticifolia

Agastache urticifolia (Benth.) Kuntze, 1891

Lophanthus urticifolius Benth., Edwards's Bot. Reg. 15: t. 1282 (1829).
Vleckia urticifolia (Benth.) Raf., Fl. Tellur. 3: 89 (1837).
Agastache glaucifolia A.Heller, Muhlenbergia 1: 32 (1901).
Agastache urticifolia var. glaucifolia (A.Heller) Cronquist in C.L.Hitchcock & al., Vasc. Pl. Pacif. N. W. 4: 250 (1959).

Native distribution areas:

Continental: Northern America
Regional: Canada
British Columbia
Regional: Western USA
California, Colorado, Montana, Nevada, Oregon, Utah, Washington

References: Brummitt, R.K. 2001. TDWG – World Geographical Scheme for Recording Plant Distributions, 2nd Edition
Primary references

Kuntze, O. 1891. Revisio generum plantarum vascularium omnium atque cellularium multarum secundum leges nomenclaturae internationales cum enumeratione plantarum exoticarum in itinere mundi collectarum. Pars II. Pp. 377–1011. Arthur Felix, Leipzig [etc.]. BHL Reference page. : 2:511.

Additional references

Govaerts, R.H.A. 2003. World Checklist of Selected Plant Families Database in ACCESS: 1-216203. The Board of Trustees of the Royal Botanic Gardens, Kew. [unavailable for the public] Reference page.


Govaerts, R. et al. 2022. Agastache urticifolia in World Checklist of Selected Plant Families. The Board of Trustees of the Royal Botanic Gardens, Kew. Published online. Accessed: 2022 May 02. Reference page.
Hassler, M. 2022. Agastache urticifolia. World Plants: Synonymic Checklists of the Vascular Plants of the World In: Roskovh, Y., Abucay, L., Orrell, T., Nicolson, D., Bailly, N., Kirk, P., Bourgoin, T., DeWalt, R.E., Decock, W., De Wever, A., Nieukerken, E. van, Zarucchi, J. & Penev, L., eds. 2022. Species 2000 & ITIS Catalogue of Life. Published online. Accessed: 2022 May 02. Reference page.
International Plant Names Index. 2022. Agastache urticifolia. Published online. Accessed: May 02 2022.
USDA, ARS, Germplasm Resources Information Network. Agastache urticifolia in the Germplasm Resources Information Network (GRIN), U.S. Department of Agriculture Agricultural Research Service. Accessed: 2022 May 02.

Vernacular names
English: nettle-leaf giant hyssop
suomi: Hammasiiso

Agastache urticifolia is a species of flowering plant in the mint family known by the common name nettleleaf giant hyssop[1] or horse mint.[2]


It is native to western North America from British Columbia to California to Colorado, where it grows in many habitat types. This is an aromatic perennial herb growing an erect stem with widely spaced leaves, each lance-shaped to nearly triangular and toothed.
Closeup of Agastache urticifolia flowerhead

The leaves are up to 8 centimeters long and 7 wide. The inflorescence is a dense spike of many flowers. Each flower has long sepals tipped with bright purple and tubular corollas in shades of pink and purple. The fruit is a light brown, fuzzy nutlet about 2 millimeters long.

The dried leaves and flowers can be made into tea. It has been used medicinally to treat rheumatism, upset stomachs, and colds.[3]

The plant was used medicinally by several Native American groups, especially the leaves.

"Plants Profile for Agastache urticifolia (nettleleaf giant hyssop)". PLANTS Web Development Team. Retrieved 3 April 2017.
"Calflora: Agastache urticifolia". Retrieved 3 April 2017.
Fagan, Damian (2019). Wildflowers of Oregon: A Field Guide to Over 400 Wildflowers, Trees, and Shrubs of the Coast, Cascades, and High Desert. Guilford, CT: FalconGuides. p. 202. ISBN 1-4930-3633-5. OCLC 1073035766.

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