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Collomia larsenii

Higher Taxonomy
Family: PolemoniaceaeView DescriptionDichotomous Key

Habit: Annual, perennial herb, shrub, vine. Leaf: simple or compound, cauline (or most basal), alternate or opposite; stipules 0. Inflorescence: cymes, heads, clusters, or flower 1; bracts in involucres or not. Flower: sepals generally 5, fused at base, translucent membrane generally connecting lobes, torn by fruit; corolla generally 5-lobed, radial or bilateral, salverform to bell-shaped, throat often well defined; stamens generally 5, epipetalous, attached at >= 1 level, filaments of >= 1 length, pollen white, yellow, blue, or red; ovary superior, chambers generally 3, style 1, stigmas generally 3. Fruit: capsule. Seed: 1--many, when wetted swelling or not, gelatinous or not.
Genera In Family: 26 genera, 314 species: America, northern Europe, northern Asia; some cultivated (Cantua, Cobaea (cup-and-saucer vine), Collomia, Gilia, Ipomopsis, Linanthus, Phlox). Note: Leptodactylon moved to Linanthus.
eFlora Treatment Author: Robert Patterson, family description, key to genera, except as noted
Scientific Editor: Robert Patterson, Thomas J. Rosatti.
Genus: CollomiaView DescriptionDichotomous Key

Stem: hairy or glandular. Leaf: alternate, simple, entire to generally pinnate-lobed, linear to ovate [fan-shaped]; basal short-petioled; cauline sessile. Inflorescence: heads or clusters, terminal, or flowers 1--3 in axils. Flower: calyx lobes connected by narrow membrane forming a pitcher-like projection at sinus, enlarging, not rupturing in fruit; corolla salverform to funnel-shaped. Fruit: ovate to elliptic, explosively dehiscent, valves reflexed on dehiscence. Seed: 1(2--3) per chamber, oblong, generally gelatinous when wet, brown. Chromosomes: 2n=16.
Species In Genus: 15 species: North America, southern South America. Etymology: (Greek: glue, from wet seed surface) Note: Annual species self-pollinated; perennial herb species generally cross-pollinated.
eFlora Treatment Author: Leigh A. Johnson & Dieter H. Wilken

Collomia larsenii (A. Gray) Payson
Habit: Perennial herb, generally cespitose, from slender rhizomes. Stem: generally branched, < 5 cm; internodes congested, glandular-hairy. Leaf: blade < 2 cm, 1--2-pinnate- or -palmate-lobed from elongate, clasping petiole; lobes linear-oblong, narrowed at base, glandular-hairy. Inflorescence: clusters, terminal; flowers 6--9. Flower: calyx 5--9 mm; corolla 10--15 mm, light to deep purple; filaments attached at 1 level, > 3 mm, pollen blue. Seed: 1 per chamber.
Ecology: Volcanic talus; Elevation: 2225--3500 m. Bioregional Distribution: CaRH (Lassen, Magee peaks, Little Mount Hoffman); Distribution Outside California: to Washington. Flowering Time: Jun--Sep
Synonyms: Collomia debilis (S. Watson) Greene var. larsenii (A. Gray) Brand
Unabridged Note: Distinct from Collomia debilis of northern Washington, Rocky Mountains.
eFlora Treatment Author: Leigh A. Johnson & Dieter H. Wilken
Jepson Online Interchange
Listed on CNPS Rare Plant Inventory

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Next taxon: Collomia linearis

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botanical illustration including Collomia larsenii


Citation for this treatment: Leigh A. Johnson & Dieter H. Wilken 2017. Collomia larsenii, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on June 26, 2017.

Citation for the whole project: Jepson Flora Project (eds.) 2017. Jepson eFlora,, accessed on June 26, 2017.

Collomia larsenii
click for enlargement
© 2006 Julie Kierstead Nelson
Collomia larsenii
click for enlargement
© 2008 George W. Hartwell
Collomia larsenii
click for enlargement
© 2008 George W. Hartwell
Collomia larsenii
click for enlargement
© 2009 George W. Hartwell
Collomia larsenii
click for enlargement
© 2009 George W. Hartwell
Collomia larsenii
click for enlargement
© 2008 George W. Hartwell

More photos of Collomia larsenii in CalPhotos

Geographic subdivisions for Collomia larsenii:
CaRH (Lassen, Magee peaks, Little Mount Hoffman);
Markers link to CCH specimen records. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues. Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
map of distribution 1
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).

View elevation by latitude chart
Data provided by the participants of the Consortium of California Herbaria.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.