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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
MNPS Threat Rank:

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

Species Range

Range Comments
BC, MT south to CA, AZ and UT (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).>

Observations in Montana Natural Heritage Program Database
Number of Observations: 10

(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)


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Citation for data on this website:
Large-flower Collomia — Collomia grandiflora.  Montana Field Guide.  .  Retrieved on , from