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Montana Field Guide

Montana Field Guides

Bitter Fleabane - Erigeron acris
Other Names:  Trimorpha acris, Erigeron kamtschaticus, Erigeron nivalis

Native Species

Global Rank: G5
State Rank: S5

Agency Status
MNPS Threat Rank:
C-value: 5

External Links

General Description
Short-lived, tap- or fibrous-rooted perennial. Stems ascending to erect, 5–60 cm. Herbage sparsely hirsute; stipitate-glandular. Leaves basal and cauline; blades oblanceolate, 2–10 cm long, entire, narrower and sessile above. Heads 1 to 30, radiate. Involucres hemispheric, 4–8 mm high; phyllaries in 2 to 3 series, glandular, hirsute, sometimes purple. Rays white to pink, 40 to 50; ligules erect, filiform, 3–5 mm long. Disk corollas 4–5 mm long. Achenes ca. 2 mm long (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Our plants are variety debilis A. Gray and kamtschaticus (DC.) Herder

Range Comments
Circumboreal south to CA, CO, MN and ME (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 14

(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)

Stony soil of open forest, cliffs, streambanks, trails; valleys to alpine (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

  • Additional ReferencesLegend:   View Online Publication
    Do you know of a citation we're missing?
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
    • Martinka, R.R. 1970. Structural characteristics and ecological relationships of male blue grouse (Dendragapus obscurus (Say)) territories in southwestern Montana. Ph.D Dissertation. Bozeman, MT: Montana State University. 73 p.
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Citation for data on this website:
Bitter Fleabane — Erigeron acris.  Montana Field Guide.  .  Retrieved on , from