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Potentilla breweri

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

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

Potentilla breweri S. Watson
Habit: Plant +- tufted from few-branched caudex; glands generally 0. Stem: decumbent to ascending, generally 10--40 cm, +- cottony-hairy. Leaf: pinnate, petiole generally < blade; basal generally 3--15 cm, leaflets 3--7 per side, +- overlapped, larger generally 5--20 mm, obovate, palmately toothed > 1/2 to midvein, generally white-hairy. Inflorescence: 3--15-flowered. Flower: hypanthium 4--5 mm wide; petals 5--9 mm; filaments 1.5--4 mm, anthers 0.7--1.2 mm; pistils 15--25, styles 2--3 mm, +- slender. Fruit: 1.5--2 mm, smooth to +- veined, brown. Chromosomes: 2n=+-72--102.
Ecology: Meadows, rocks; Elevation: 1500--2300 m (KR) or 2700--3700 m. Bioregional Distribution: c KR, SNH, Wrn; Distribution Outside California: to Washington, Nevada. Flowering Time: Jun--Sep
Synonyms: Potentilla drummondii subsp. breweri (S. Watson) Ertter;
Jepson eFlora Author: Barbara Ertter
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botanical illustration including Potentilla breweri


Citation for this treatment: Barbara Ertter 2012, Potentilla breweri, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on December 09, 2018.

Citation for the whole project: Jepson Flora Project (eds.) 2018, Jepson eFlora,, accessed on December 09, 2018.

Potentilla breweri
click for enlargement
© 2006 Steve Matson
Potentilla breweri
click for enlargement
© 1999 Larry Blakely
Potentilla breweri
click for enlargement
© 2015 Barry Breckling
Potentilla breweri
click for enlargement
© 1999 Larry Blakely
Potentilla breweri
click for enlargement
© 2015 Barry Breckling
Potentilla breweri
click for enlargement
© 2006 Steve Matson

More photos of Potentilla breweri in CalPhotos

Geographic subdivisions for Potentilla breweri:
c KR, SNH, Wrn;
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, if there are more than 1 infraspecific taxon in CA.
Blue line denotes eFlora flowering time.