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Montana Field Guides

Noble Yarrow - Achillea nobilis

Non-native Species

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

Agency Status


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General Description
Stems ascending to erect, simple, 20–60 cm. Herbage villous below, tomentose above. Leaves mainly cauline, sessile; blades ovate, 1–6 cm long, twice pinnately dissected; ultimate lobes ca. 1 mm long and wide. Inflorescence hemispheric 2–10 cm across with numerous heads. Involucre sparsely glandular, 2–3 mm high, ca. 2 mm wide; bracts in 2 series; outer bracts light green, scarious, villous. Rays white, 8 to 10; ligules 1–2 mm long, wider than long. Disk flowers white,10 to 30; corolla 1–2 mm long. Achenes ca. 1 mm long (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Range Comments
Introduced to MT more than 100 years ago; native to Europe. Collected in Flathead and Lake counties (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 234

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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 frigidus, Bombus melanopygus, Bombus mixtus, Bombus ternarius, and Bombus insularis (Thorp et al. 1983, Wilson et al. 2010, Koch et al. 2012).


  • Literature Cited AboveLegend:   View Online Publication
    • 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.
    • Wilson, J.S., L.E. Wilson, L.D. Loftis, and T. Griswold. 2010. The montane bee fauna of north central Washington, USA, with floral associations. Western North American Naturalist 70(2): 198-207.
  • Additional ReferencesLegend:   View Online Publication
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    • 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:
Noble Yarrow — Achillea nobilis.  Montana Field Guide.  .  Retrieved on , from