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Montana Field Guide

Montana Field Guides

Large-flower Fleabane - Erigeron grandiflorus

Species of Concern
Native Species

Global Rank: G5
State Rank: S1S3
(see State Rank Reason below)

Agency Status
MNPS Threat Rank:

External Links

State Rank Reason (see State Rank above)
Only a few collections from Carbon and Sweet Grass counties.
General Description
Fibrous-rooted perennial usually with a simple caudex. Stems ascending to erect, 3–10 cm. Herbage villous, often minutely glandular. Leaves basal and cauline; blades linear-oblanceolate to oblong, entire, 6–25 mm long, becoming linear above. Heads radiate, solitary. Involucres hemispheric, 8–10 mm high; phyllaries in 2 or 3 series, purplish, minutely glandular, tangled-villous with septate hairs. Rays 60 to 125, blue, 8–13 mm long. Disk corollas 4–5 mm long. Achenes 2–3 mm long (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range

Range Comments
Sweet Grass and Carbon counties; AK south to WY (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 11

(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)


Ecological Systems Associated with this Species

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Citation for data on this website:
Large-flower Fleabane — Erigeron grandiflorus.  Montana Field Guide.  .  Retrieved on , from