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Montana Field Guide

Montana Field Guides

Great Northern Aster - Canadanthus modestus
Other Names:  Aster modestus

Native Species

Global Rank: G5
State Rank: SNR

Agency Status
MNPS Threat Rank:
C-value: 6

External Links

General Description
Rhizomatous perennial. Stems erect, 30–80 cm. Herbage glandular-puberulent. Leaves cauline, sessile, lanceolate, weakly serrate to entire, 4–10 cm long, clasping above, the lowest deciduous. Inflorescence leafy-corymbiform, often short with few heads; peduncles stipitate-glandular. Heads radiate; involucre narrowly campanulate, 6–10 mm high; phyllaries subequal, linear-lanceolate, glandular, green or purplish; the outer foliaceous. Ray flowers female, 20 to 65, purple; ligules 7–12 mm long. Disk flowers 40 to 65, perfect, whitish to purplish; corolla 5–7 mm long; style branches deltoid. Pappus of numerous capillary bristles, brownish. Achenes fusiform, 4- to 9-nerved, 2–4 mm long, sparsely strigose (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range

Range Comments
AK to ON south to OR, MT and MN (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 172

(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)

Moist meadows, thickets, open forests, especially along streams, wetlands; valleys, montane (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?
    • 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.
    • Jones, W. W. 1901. Preliminary flora of Gallatin County. M.S. Thesis. Bozeman, MT: Montana State College. 78 pp.
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
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Citation for data on this website:
Great Northern Aster — Canadanthus modestus.  Montana Field Guide.  .  Retrieved on , from