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Montana Field Guide

Montana Field Guides

Steppe Agoseris - Agoseris parviflora
Other Names:  Agoseris glauca var. laciniata

Native Species

Global Rank: G4G5
State Rank: SNR
C-value: 4

Agency Status


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General Description
Perennial 5–20 cm. Leaves linear-lanceolate, 3–15 cm long, deeply pinnately divided into 5–8 pairs of linear lobes. Herbage sparsely villous to tomentose. Involucres 2–3 cm long; phyllaries narrowly lanceolate, in ca. 2 series, green, glabrous to tomentose with a purple midvein. Rays yellow; ligules 8–15 mm long. Pappus 1–2 cm long. Achene body 5–7 mm long; beak 3–5 mm long (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Diagnostic Characteristics
Agoseris species in Montana share the following characteristics:
*Solitary flowerhead composed only of ray (ligulate) flowers; each ray tipped with 5 lobes.
*Single, long flowering stem (peduncle) that has milky sap;
*Leaves are only basal; each leaf with a simple blade that tapering to the stem (petiole).

Steppe Agoseris - Agoseris parviflora
*Life Span: Perennial
*Flowers (Corollas): Yellow
*Leaf Blades: Lobes divided half-way to the midvein.
*Involucral Bracts: Glabrous or tomentose.
*Achene Beak: Less than 6 mm long.

Large-flower Agoseris - Agoseris grandiflora
*Life Span: Perennial
*Flowers (Corollas): Yellow
*Leaf Blades: Lobes divided half-way to the midvein.
*Involucral Bracts: Villous on the margins.
*Achene Beak: At least 8 mm long.

Pale Agoseris - Agoseris glauca
*Life Span: Perennial
*Flowers (Corollas): Yellow
*Leaf Blades: Entire or with shallow lobes that are less than half-way to the midvein.

Annual Agoseris - Agoseris heterophylla
*Life Span: Annual
*Flowers (Corollas): Yellow
*Leaf Blades: Not lobed; entire to slightly dentate.

Orange Agoseris - Agoseris aurantiaca
*Life Span: Perennial
*Flowers (Corollas): Orange to pink, often drying light purple
*Leaf Blades: Entire, dentate, or with shallow lobes.

Species Range
Montana Range Range Descriptions


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

Observations in Montana Natural Heritage Program Database
Number of Observations: 5

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

  • Literature Cited AboveLegend:   View Online Publication
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
    • 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?
    • Aho, Ken Andrew. 2006. Alpine and Cliff Ecosystems in the North-Central Rocky Mountains. Ph.D. Dissertation. Bozeman, Montana: Montana State University. 343 p.
    • Culver, D.R. 1994. Floristic analysis of the Centennial Region, Montana. M.Sc. Thesis. Montana State University, Bozeman. 199 pp.
    • 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.
    • Quire, R.L. 2013. The sagebrush steppe of Montana and southeastern Idaho shows evidence of high native plant diversity, stability, and resistance to the detrimental effects of nonnative plant species. M.Sc. Thesis. Bozeman, MT: Montana State University. 124 p.
  • Web Search Engines for Articles on "Steppe Agoseris"
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Citation for data on this website:
Steppe Agoseris — Agoseris parviflora.  Montana Field Guide.  .  Retrieved on , from