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Montana Field Guide

Montana Field Guides

Feverfew - Tanacetum parthenium
Other Names:  Feather-leaved Tansy, Chrysanthemum parthenium

Non-native Species

Global Rank: GNR
State Rank: SNA
C-value: 1

Agency Status


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General Description
Rhizomatous or taprooted. Stems erect, 25–80 cm. Herbage puberulent. Leaf blades 1–10 cm long, pinnately divided; segments oblanceolate, deeply serrate. Involucre 5–7 mm across; phyllaries in 2 or 3 series. Ray flowers female, white; ligules 2–8 mm long. Disk corollas ca. 2 mm long. Achenes 1–2 mm long, 5- to 10-angled (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Range Comments
Introduced in eastern U.S. and BC to MT south to NV, UT and CO (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 10

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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 bifarius, Bombus rufocinctus, Bombus ternarius, Bombus occidentalis, and Bombus flavidus (Thorp et al. 1983, Colla and Dumesh 2010, Koch et al. 2012).


  • 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.
    • Koch, J., J. Strange, and P. Williams. 2012. Bumble bees of the western United States. Washington, DC: USDA Forest Service, Pollinator Partnership. 143 p.
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
    • 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.
  • Additional ReferencesLegend:   View Online Publication
    Do you know of a citation we're missing?
    • 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.
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Citation for data on this website:
Feverfew — Tanacetum parthenium.  Montana Field Guide.  .  Retrieved on , from