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Montana Field Guide

Montana Field Guides

Orange Agoseris - Agoseris aurantiaca

Native Species

Global Rank: G5
State Rank: S4

Agency Status
MNPS Threat Rank:
C-value: 5

External Links

General Description
Perennial 6–60 cm. Leaves oblanceolate, 5–35 cm long, entire, dentate, or with pinnate, linear lobes. Herbage glabrous to sparsely villous. Involucre 1–3 cm high; phyllaries lanceolate, in 2 to 4 indistinct series, green or purple-spotted, glabrate to villous. Rays orange to pink; ligules 6–12 mm long. Pappus 6–15 mm long. Achene body 5–9 mm long; beak 3–7 mm long (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Our plants are varieties aurantiaca or carnea (Rydb.) Lesica.

Species Range

Range Comments
BC to QC, 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: 150

(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)


  • Additional ReferencesLegend:   View Online Publication
    Do you know of a citation we're missing?
    • Fultz, J.E. 2005. Effects of shelterwood management on flower-visiting insects and their floral resources. M.Sc. Thesis. Bozeman, MT: Montana State University. 163 p.
    • Hollenbeck, R.R. 1974. Growth rates and movements within a population of Rana pretiosa pretiosa Baird and Girard in south central Montana. Ph.D. Dissertation. Bozeman, Montana: Montana State University. 66 p.
    • Joslin, G.J. 1975. Behavior and environmental selection by Elk (Cervus canadensis nelsoni) during surrmer and fall in the First and Second Yellow Mule drainages, Madison County, Montana. M.Sc. Thesis. Bozeman, Montana: Montana State University, Bozeman. 65 p.
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
    • Stoecker, R.E. 1967. A population study of five species of small rodents in the Bridger Mountains of Montana. M.Sc. Thesis. Bozeman, Montana: Montana State University. 32 p.
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Citation for data on this website:
Orange Agoseris — Agoseris aurantiaca.  Montana Field Guide.  .  Retrieved on , from