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Montana Field Guide

Montana Field Guides

Annual Agoseris - Agoseris heterophylla

Status Under Review
Native Species

Global Rank: G5
State Rank: SU

Agency Status
MNPS Threat Rank:

External Links

General Description
Annual 4–25 cm. Leaves oblanceolate, 2–10 cm long, entire to remotely dentate. Herbage puberulent to villous. Involucre 1–2 cm high; phyllaries in 2 or 3 series, the outer often spotted, lanceolate, villous with dark-septate hairs. Rays yellow; ligules 2–4 mm long. Pappus 4–9 mm long. Achene body 2–5 mm long; beak 7–10 mm long (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range

Range Comments
BC, MT south to CA, AZ and NM (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 28

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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 species or genera where their geographic ranges overlap: Bombus bifarius and Bombus insularis (Wilson et al. 2010).

  • Literature Cited AboveLegend:   View Online Publication
    • 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
    Do you know of a citation we're missing?
    • Arvidson, Michael. 2000. Element occurrence form(s). U.S. Forest Service for the Montana Natural Heritage Program.
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
    • Skinner, Beverly. 2020. Electronic mail correspondence of plants found on the Lost Trail National Wildlife Refuge. Provided on February 28, 2020.
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Citation for data on this website:
Annual Agoseris — Agoseris heterophylla.  Montana Field Guide.  .  Retrieved on , from