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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
C-value: 5


Agency Status
USFWS:
USFS:
BLM:


 

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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 et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

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

Species Range
Montana Range Range Descriptions

Native
 


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

Observations in Montana Natural Heritage Program Database
Number of Observations: 24

(Click on the following maps and charts to see full sized version) Map Help and Descriptions
Relative Density

Recency

 

(Observations spanning multiple months or years are excluded from time charts)



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

Ecology
POLLINATORS
The following animal species have been reported as pollinators of this plant species or its genus where their geographic ranges overlap: Bombus bifarius, Bombus centralis, Bombus fervidus, Bombus flavifrons, Bombus huntii, Bombus melanopygus, Bombus mixtus, Bombus rufocinctus, Bombus occidentalis, and Bombus insularis (Thorp et al. 1983, Wilson et al. 2010, Colla and Dumesh 2010, Koch et al. 2012).


References
  •  Literature Cited Above
  •  Additional References
  •  Web Search Engines for Articles on "Bitter Fleabane"
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Citation for data on this website:
Bitter Fleabane — Erigeron acris.  Montana Field Guide.  .  Retrieved on , from