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Potentilla anserina subsp. pacifica
PACIFIC SILVERWEED

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: PotentillaView DescriptionDichotomous Key

Common Name: CINQUEFOIL
Habit: Annual to perennial herb; odor generally 0. Leaf: generally basal, odd-1-pinnately, 1-palmately, or 1-ternately compound; leaflets 1--8(13) per side, +- toothed, generally +- separated, terminal generally +- = lateral; margins generally flat. Inflorescence: generally cyme, generally +- open; pedicels generally +- straight, bractlets 0. Flower: hypanthium +- shallow, bractlets generally 5, generally < sepals, generally flat; sepals +- triangular; petals (2)4--20 mm, >= sepals, generally +- widely obcordate, generally yellow; stamens 10--25; pistils generally > 10, ovaries superior, styles slender to +- tapering, generally attached near fruit tip. Fruit: achene, generally glabrous.
Species In Genus: +- 400 species: mostly northern temperate, arctic. Etymology: (Latin: diminutive of powerful, for reputed medicinal value) Note: Other taxa in TJM (1993) moved to Comarum, Dasiphora, Drymocallis.
eFlora Treatment Author: Barbara Ertter
Species: Potentilla anserinaView Description 

Habit: Plant tufted from stolons, nonglandular. Leaf: pinnate, petiole << blade; main leaflets 5--10 per side, +- elliptic to oblanceolate, evenly 7--31-toothed 1/2--1/3 to midvein, densely hairy at least abaxially, reduced leaflets alternating. Inflorescence: flowers 1 from stolon nodes. Flower: hypanthium 4--7 mm wide; filaments 1--3.5 mm, anthers +- 1 mm; styles +- 2 mm, slender. Fruit: +- 2 mm, rough, dark red-brown.


Potentilla anserina subsp. pacifica (Howell) Rousi
NATIVE
Leaf: 3--50(75) cm, +- glabrous adaxially; main leaflets 10--50 mm. Inflorescence: pedicels generally 5--30 cm. Flower: petals 8--20 mm; pistils generally 20--200. Chromosomes: 2n=28.
Ecology: Coastal wetlands, often brackish; Elevation: generally < 150 m. Bioregional Distribution: NCo, CCo, SCo; Distribution Outside California: coastal North America. Flowering Time: Mar--Oct
Synonyms: Potentilla egedei Wormsk. ex Hornem. var. grandis (Torr. & A. Gray) J.T. Howell
eFlora Treatment Author: Barbara Ertter
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Citation for this treatment: Barbara Ertter 2016. Potentilla anserina subsp. pacifica, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=52485, accessed on February 11, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on February 11, 2016.


Potentilla anserina subsp. Pacifica
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© 2007 California Academy of Sciences
Potentilla anserina subsp. pacifica
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© 2014 Neal Kramer
Potentilla anserina subsp. pacifica
click for enlargement
© 2014 Neal Kramer
Potentilla anserina subsp. pacifica
click for enlargement
© 2009 California Academy of Sciences
Potentilla anserina subsp. pacifica
click for enlargement
© 2014 Neal Kramer
Potentilla anserina subsp. pacifica
click for enlargement
© 2009 Keir Morse

More photos of Potentilla anserina subsp. pacifica in CalPhotos


Geographic subdivisions for Potentilla anserina subsp. pacifica:
NCo, CCo, SCo;
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.