Search Field Guide
Advanced Search
MT Gov Logo
Montana Field Guide

Montana Field Guides

Lavender Hyssop - Agastache foeniculum

Status Under Review
Native Species

Global Rank: G5
State Rank: SU
(see State Rank Reason below)

Agency Status


External Links

State Rank Reason (see State Rank above)
One collection at MONT:

Heidel #1379 7 July 1995. Powder River Co. Ashland District of Custer National For. Near head of draw above Ash Creek Uncommon at base of N-facing slope. Elev. 3910 with P-pine, Mahonia repens. T2S R46E S19

Two collections at MONTU:

Lesica #4582 24 June, 1988. Locally common in elm-green ash forest at the head of the North Fork Burns Creek ca. 7 miles SE of Richey. Ca. 850m. T22N R54E S36. With Oryzopsis micrantha and Carex sprengelii.

Keith H. Dueholm & Bonnie Heidel #12,216. Carter Co.: Long Pines, head of Maverick Gulch. SW/NW Sect. 5, T3S R61E. Jct. of 2 drainages just below steep slopes with ponderosa pine, fairly open. 2 July 1994. Elev. 3,800ft.
General Description
Stems erect, 50–120 cm, simple or few-branched, puberulent at the nodes. Leaf blades cordate-ovate, glabrous above, puberulent below, 4–9 cm long, acute, serrate. Inflorescence 3–8 cm long with purplish bracts. Flowers: calyx conical, puberulent, 4–7 mm long, teeth deltoid, purplish; corolla blue, 15–20 mm long (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Range Comments
Southern Ontario west to Saskatchewan and Alberta in Canada, south to Wisconsin, northern Iowa, South Dakota, Northwest Nebraska, and north-central Colorado in the United States (McGregor et al. [eds.] 1986). In Montana plants are found in the eastern-quarter of the state (McGregor et al. [eds.] 1986).

Observations in Montana Natural Heritage Program Database
Number of Observations: 11

(Click on the following maps and charts to see full sized version) Map Help and Descriptions
Relative Density



(Observations spanning multiple months or years are excluded from time charts)


The following animal species have been reported as pollinators of this plant species or its genus where their geographic ranges overlap: Bombus appositus, Bombus centralis, Bombus flavifrons, Bombus nevadensis, Bombus ternarius, Bombus griseocollis, Bombus impatiens, Bombus insularis, and Bombus suckleyi (Thorp et al. 1983, Johnson 1986, Mayer et al. 2000, Colla and Dumesh 2010, Williams et al. 2014).

  • Literature Cited AboveLegend:   View Online Publication
    • Colla, S.R. and S. Dumesh. 2010. The bumble bees of southern Ontario: notes on natural history and distribution. Journal of the Entomological Society of Ontario 141:39-68.
    • Johnson, R.A. 1986. Intraspecific resource partitioning in the bumble bees Bombus ternarius and B. pennsylvanicus. Ecology 67:133-138.
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
    • Mayer, D.F., E.R. Miliczky, B.F. Finnigan, and C.A. Johnson. 2000. The bee fauna (Hymenoptera: Apoidea) of southeastern Washington. Journal of the Entomological Society of British Columbia 97: 25-31.
    • McGregor, R.L. (coordinator), T.M. Barkley, R.E. Brooks, and E.K. Schofield (eds). 1986. Flora of the Great Plains: Great Plains Flora Association. Lawrence, KS: Univ. Press Kansas. 1392 pp.
    • Thorp, R.W., D.S. Horning, and L.L. Dunning. 1983. Bumble bees and cuckoo bumble bees of California (Hymenoptera: Apidae). Bulletin of the California Insect Survey 23:1-79.
    • Williams, P., R. Thorp, L. Richardson, and S. Colla. 2014. Bumble Bees of North America. Princeton, NJ: Princeton University Press. 208 p.
  • Additional ReferencesLegend:   View Online Publication
    Do you know of a citation we're missing?
    • Gleason, Henry A., & Arthur Cronquist. 1963. Manual of Vascular Plants of Northeastern United States and Adjacent Canada. D. Van Nostrand Company, New York, New York. 810 pp.
    • Heidel, B.L. and H. Marriott. 1996. Sensitive plant species survey of the Ashland District, Custer National Forest, Powder River and Rosebud Counties, Montana. Unpublished report to the U.S. Forest Service. Montana Natural Heritage Program, Helena, Montana. 94 pp. plus appendices.
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2022. Manual of Montana Vascular Plants, Second Edition. Fort Worth, TX: BRIT Press. viii + 779 p.
    • U.S. Department of Agriculture, Natural Resources Conservation Service. 1999. November 3-last update. The PLANTS Database.
  • Web Search Engines for Articles on "Lavender Hyssop"
Login Logout
Citation for data on this website:
Lavender Hyssop — Agastache foeniculum.  Montana Field Guide.  .  Retrieved on , from