Wildflowers of the United States

Home Journal Family Index - All States Photo Albums News About Privacy

Large Flowered Collomia, Grand Collomia, Mountain Collomia - Collomia grandiflora


Family: Polemoniaceae - Phlox family Genus Common Name: Trumpet Flower Native Status: NativeAnnual Herb
Collomia grandiflora - Large Flowered Collomia, Grand Collomia, Mountain Collomia. There are 13 species of Collomia in the United States, with all but 1 of them (Collomia linearis) being found exclusively in the western half of the United States. C. linearis is found in the west as well as the rest of the northern United States and most of Canada. The species presented here, C. grandiflora, found in 10 western states as well as in British Columbia (C. heterophylla and C. linearis are also found in British Columbia.)

Found in:
AZ, CA, CO, ID, MT, NV, OR, UT, WA, WY

Leave comments on Collomia grandiflora at this link.
Collomia grandiflora

Distribution of Collomia grandiflora in the United States and Canada:
Map unavailable.
Map courtesy of The Biota of North America Program.
Map color key

Search Our Database: Enter any portion of the Scientific, Common Name, or both.
Scientific name:
Common name:

Example: Enter "lob" in the common name field and you'll get all our species that have "lobelia" in the common name, as well as "sharp-lobed hepatica".

Do a general Google search of the entire site:


#ad

Follow on Twitter
Follow USWildflowers on Twitter



Site: Kleinschmidt Grade, Adams County, ID Date: 2012-May-28Photographer: Gerald C. Williamson
Nikon D7000
The flowers of Collomia grandiflora are yellow or salmon, fading to white. While all of the plants I photographed had white pollen, blue is reported as being more characteristic, at least in California.
Collomia grandiflora

Site: Kleinschmidt Grade, Adams County, ID Date: 2012-May-25Photographer: Gerald C Williamson
Nikon D7000
The five corolla lobes fuse to form a trumpet-shaped corolla, giving the genus the "Trumpet Flower" common name. In the lower flower in this photo you can see three exserted stamens, as well as two included stamens. Along with size and to a lesser extent color, stamen position is among the differences with the somewhat similar Collomia linearis - Narrowleaf Mountain Trumpet. C. grandiflora will normally have at least 1 exserted stamen; all those of C. linearis are included. The style extends beyond the corolla. It is split into three stigmas, characteristic of the Phlox family.
Click on the photo for a larger image
Collomia grandiflora

Site: Kleinschmidt Grade, Adams County, ID Date: 2012-May-28Photographer: Gerald C Williamson
Nikon D7000
The stem and involucre bracts are quite hairy, with the involucre bracts and upper leaves usually glandular-hairy. The lower leaves may be glabrous or only slightly hairy.
Click on the photo for a larger image
Collomia grandiflora

Site: Kleinschmidt Grade, Adams County, ID Date: 2012-May-28Photographer: Gerald C Williamson
Nikon D7000
The alternate, lanceolate to linear leaves rise on a hairy stem to the terminal cluster of salmon to white flowers. The plant is usually unbranched, although there may occasionally be axillary stems. The plants I observed were all 12" to 15" tall.
Click on the photo for a larger image
Collomia grandiflora

References used for identification and information:
#ad
Collomia grandiflora initially published on USWildflowers.com 2012-07-07; Updated 2017-03-02

Commercial / Cookie Notice

Looking for Wildflowers for a specific state? Check here:



All content except USDA Plants Database map Copyright Gerald C. Williamson 2024
Photographs Copyright owned by the named photographer



Code Update 20230302