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Search for native plants by scientific name, common name or family. If you are not sure what you are looking for, try the Combination Search or our Recommended Species lists.

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Collomia grandiflora (Grand collomia)
Glase, Terry

Collomia grandiflora

Collomia grandiflora Douglas ex Lindl.

Grand Collomia, Large-flower Mountain-trumpet, Collomia

Polemoniaceae (Phlox Family)


USDA Symbol: COGR4

USDA Native Status: L48 (N), CAN (N)

Large-flower mountain-trumpet or collomis is a leafy, erect annual, 4 in. to 3 ft. high. Its stems are usually unbranched and its leaves are narrow, becoming smaller upward. Funnelform flowers, occurring in dense, terminal heads, are yellow-salmon to almost white.


From the Image Gallery

6 photo(s) available in the Image Gallery

Plant Characteristics

Duration: Annual
Habit: Herb
Fruit Type: Capsule
Size Notes: Up to about 3 feet tall.

Bloom Information

Bloom Color: Orange , Yellow
Bloom Time: Apr , May , Jun , Jul , Aug


USA: AZ , CA , CO , ID , MT , NV , OR , UT , WA , WY
Canada: BC
Native Distribution: B.C. to Missoula Co., MT, s. to CA, AZ & w. CO
Native Habitat: Open, wooded slopes below 8000 ft.

Growing Conditions

Light Requirement: Part Shade
Soil Moisture: Dry
Soil Description: Dry soils.


Commercially Avail: yes

Find Seed or Plants

Find seed sources for this species at the Native Seed Network.

From the National Organizations Directory

According to the species list provided by Affiliate Organizations, this plant is on display at the following locations:

Native Seed Network - Corvallis, OR

Web Reference

Webref 30 - Calflora (2018) Calflora
Webref 23 - Southwest Environmental Information Network (2009) SEINet - Arizona Chapter

Additional resources

USDA: Find Collomia grandiflora in USDA Plants
FNA: Find Collomia grandiflora in the Flora of North America (if available)
Google: Search Google for Collomia grandiflora


Record Modified: 2023-02-01
Research By: TWC Staff

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