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Collomia grandiflora

Collomia grandiflora (*)

Classification System: APG IV

Superregnum: Eukaryota
Regnum: Plantae
Cladus: Angiosperms
Cladus: Eudicots
Cladus: Core eudicots
Cladus: Asterids
Ordo: Ericales

Familia: Polemoniaceae
Subfamilia: Polemonioideae
Tribus: Gilieae
Genus: Collomia
Species: Collomia grandiflora

Collomia grandiflora Douglas, D. ex Lindl., Bot. Reg. 14: t. 1174. 1828.
References 2018. Collomia grandiflora. Missouri Botanical Garden. Published on the internet. Accessed: 2018 Sep 17.

Collomia grandiflora is a western North American annual plant in the phlox family (Polemoniaceae), known by the common names grand collomia,[1] large-flowered mountain trumpet, and large-flowered collomia.[2] It usually appears in sandy habitats[3] and is cultivated as an ornamental.


The plant grows to about 1 metre (3 ft 3 in)[3] and produces an erect, hairy or fuzzy stem which may be red to green in color. Arranged at wide intervals along the stem are long, lance-shaped leaves growing to about 10 centimetres (4 in),[3] the lowermost sometimes toothed along the edges. Atop the stem is an inflorescence of several flowers in white to yellow or orange. Lower flowerheads may branch from the axils of the alternate leaves. Each tubular, flat-faced flower is 2 or 3 cm wide with five fused and curving light-colored petals and five stamens[3] tipped with anthers which bear blue pollen. The fruit is a capsule containing sticky seeds.[4]

C. grandiflora, with purple stem and top and side flower heads

Five-petaled apricot flower (top left), with blue anthers and three-branched style


Some Native Americans used the roots and leaves for medicinal purposes.[5]

Laird R. Blackwell (2002). Sierra Nevada Wildflowers. Lone Pine Publishing. ISBN 1551052814.
Sierra Nevada Wildflowers, Karen Wiese, 2nd Ed., 2013, p. 106
Taylor, Ronald J. (1994) [1992]. Sagebrush Country: A Wildflower Sanctuary (rev. ed.). Missoula, MT: Mountain Press Pub. Co. p. 110. ISBN 0-87842-280-3. OCLC 25708726.
Norman F. Weeden (1996). A Sierra Nevada Flora (4th ed.). Berkeley CA: Wilderness Press. ISBN 0-89997-204-7.
Fagan, Damian (2019). Wildflowers of Oregon: A Field Guide to Over 400 Wildflowers, Trees, and Shrubs of the Coast, Cascades, and High Desert. Guilford, CT: FalconGuides. p. 229. ISBN 1-4930-3633-5. OCLC 1073035766.

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