Jepson eFlora: Taxon page
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Comarum palustre
MARSH CINQUEFOIL

Higher Taxonomy
Family: RosaceaeView DescriptionDichotomous Key

Common Name: ROSE FAMILY
Habit: Annual to tree, glandular or not. Leaf: simple to palmately or pinnately compound, generally alternate; stipules free to fused (0), persistent to deciduous. Inflorescence: cyme, raceme, panicle, cluster, or flowers 1; bractlets on pedicel ("pedicel bractlets") generally 0--3(many), subtended by bract or generally not. Flower: generally bisexual, radial; hypanthium free or fused to ovary, saucer- to funnel-shaped, subtending bractlets ("hypanthium bractlets") 0--5, alternate sepals; sepals generally 5; petals generally 5, free; stamens (0,1)5--many, anther pollen sacs generally 2; pistils (0)1--many, simple or compound, ovary superior to inferior, styles 1--5. Fruit: 1--many per flower, achene (fleshy-coated or not), follicle, drupe, or pome with generally papery core, occasionally drupe-like with 1--5 stones. Seed: generally 1--5 (per fruit, not per flower).
Genera In Family: 110 genera, +- 3000 species: worldwide, especially temperate; many cultivated for ornamental, fruit, especially Cotoneaster, Fragaria, Malus, Prunus, Pyracantha, Rosa, Rubus. Note: Number of teeth is per leaf or leaflet, not per side of leaf or leaflet, except in Drymocallis.
eFlora Treatment Author: Daniel Potter & Barbara Ertter, family description, key to genera; treatment of genera by Daniel Potter, except as noted
Scientific Editor: Daniel Potter, Thomas J. Rosatti.
Genus: ComarumView Description 


Species In Genus: 1 sp. Etymology: (Greek: fruit of Arbutus unedo)
eFlora Treatment Author: Barbara Ertter

Comarum palustre L.
NATIVE
Habit: Perennial herb, nonglandular, openly matted. Stem: non-flowering portion creeping, often floating and/or rooting at nodes; flower-stem erect to ascending, 20--50 cm, +- glabrous to +- strigose. Leaf: alternate, odd-1-pinnate to subpalmate, 5--20 cm; leaflets 2--3 per side, toothed, terminal generally +- = lateral, 15--70 mm, oblanceolate-elliptic, distal 1/3 toothed +- 1/4 to midvein, +- glabrous to sparsely strigose. Inflorescence: cyme, +- open, generally < 10-flowered; pedicels straight. Flower: hypanthium +- shallow, 5--10 mm wide; bractlets 5; sepals +- triangular; petals << sepals, 2--6 mm, +- ovate to elliptic, dark red; stamens 20--25, filaments 1.5--2.5 mm, anthers 1--1.5 mm, pollen sac 1, horseshoe-shaped; pistils many, ovaries superior, styles 0.8--2 mm, slender, jointed laterally to fruit. Fruit: achene, 1--1.5 mm, glabrous, glossy, +- brown, sometimes remaining attached to spongy receptacle. Chromosomes: 2n=28,42--64.
Ecology: Bogs, marshes; Elevation: < 2400 m. Bioregional Distribution: NCo, CaRH, n SNH, ScV, Wrn; Distribution Outside California: circumboreal. Flowering Time: May--Aug
Synonyms: Potentilla palustris (L.) Scop.
eFlora Treatment Author: Barbara Ertter
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Citation for this treatment: Barbara Ertter 2016. Comarum palustre, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=20069, accessed on February 13, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on February 13, 2016.


Comarum palustre
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© 2006 Steve Matson
Comarum palustre
click for enlargement
© 2006 Steve Matson
Comarum palustre
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© 2007 George W. Hartwell
Comarum palustre
click for enlargement
© 2006 Steve Matson
Comarum palustre
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© 2002 California Academy of Sciences
Comarum palustre
click for enlargement
© 2006 Steve Matson

More photos of Comarum palustre in CalPhotos


Geographic subdivisions for Comarum palustre:
NCo, CaRH, n SNH, ScV, Wrn;
Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
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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).

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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.