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Montana Field Guide

Montana Field Guides

Large-flower Collomia - Collomia grandiflora

Native Species

Global Rank: G5
State Rank: SNR

Agency Status


External Links

General Description
Annual, similar to the more common C. linearis. Stems simple, erect, 15–60 cm. Herbage glabrate to puberulent, glandular above. Leaves sessile, alternate, lanceolate, entire, 2–7 cm long. Inflorescence a dense, leafy-bracted, terminal cluster of sessile flowers. Flowers: calyx 5–7 mm long, the tube white; corolla yellow to light pink; tube 2–3 cm long; lobes 6–10 mm long; stamens unequally attached, mostly included in the corolla (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range
Montana Range Range Descriptions


Range Comments
BC, MT south to CA, AZ and UT (Lesica et al. 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)


  • 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.
  • Additional ReferencesLegend:   View Online Publication
    Do you know of a citation we're missing?
    • Grove, A.J. 1998. Effects of Douglas fir establishment in southwestern Montana mountain big sagebrush communities. M. Sc.Thesis. Bozeman, MT: Montana State University. 150 p.
    • Wiman, N.G. 2001. Dynamics of leafy spurge (Euphorbia esula L.) infested plant communities influenced by flea beetles in the Aphthona complex (Colepotera: Chrysomelidae). M.Sc. Thesis. Bozeman, MT: Montana State University. 148 p.
  • Web Search Engines for Articles on "Large-flower Collomia"
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Citation for data on this website:
Large-flower Collomia — Collomia grandiflora.  Montana Field Guide.  .  Retrieved on , from