Jepson eFlora: Taxon page
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Physocarpus capitatus

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: PhysocarpusView DescriptionDichotomous Key

Common Name: NINEBARK
Habit: Shrub, generally +- stellate-hairy. Leaf: petioled, stipuled, deciduous, ovate to +- round, generally palmately 3--7-lobed, crenate to serrate. Inflorescence: umbel-like cluster, bracted; pedicel bractlets generally 0. Flower: hypanthium bell-shaped, bractlets 0; sepals persistent; petals rounded, white or pale pink; stamens 20--40, exserted; pistils 1--5, fused at base (if 3--5, fused below middle), ovary superior, style thread-like, stigma head-like. Fruit: follicles, inflated or +- flat, dehiscent along both sutures. Seed: 1--4, ovoid; coat hard, shiny.
Species In Genus: +- 6 species: North America, Asia. Etymology: (Greek: bladdery fruit)
eFlora Treatment Author: Sang-Hun Oh

Physocarpus capitatus (Pursh) Kuntze
Habit: Plant 10--25 dm. Leaf: glabrous to moderately hairy; lobes generally 3--5, generally serrate. Inflorescence: >> 10-flowered, sparsely to densely hairy. Flower: hypanthium 1.5--2.5 mm, 4--4.8 mm wide at rim; sepals 2.5--3.5 mm; petals 2.5--3 mm; stamens 25--30, longest filament 4--5 mm. Fruit: 3--5, 8--10 mm, glabrous to +- hairy. Chromosomes: n=9.
Ecology: Moist banks, n-facing slopes, mixed-conifer forest; Elevation: < 1400 m. Bioregional Distribution: CA-FP (exc GV); Distribution Outside California: to Alaska, Idaho. Flowering Time: May--Jul
eFlora Treatment Author: Sang-Hun Oh
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botanical illustration including Physocarpus capitatus


Citation for this treatment: Sang-Hun Oh 2016. Physocarpus capitatus, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on May 04, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora,, accessed on May 04, 2016.

Physocarpus capitatus
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© 2008 Keir Morse
Physocarpus capitatus
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© 2008 Keir Morse
Physocarpus capitatus
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© 2010 California Academy of Sciences
Physocarpus capitatus
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© 2008 Keir Morse
Physocarpus capitatus
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© 2010 Barry Breckling
Physocarpus capitatus
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© 2009 Barry Breckling

More photos of Physocarpus capitatus in CalPhotos

Geographic subdivisions for Physocarpus capitatus:
CA-FP (exc GV);
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.
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.