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    Vascular Plants of California
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Pyrus communis

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: PyrusView Description 

Common Name: PEAR
Habit: Tree [(shrub)], thorny or not. Leaf: simple, toothed (entire). Inflorescence: few-flowered clusters at ends of short-shoots; pedicel bractlets generally 2--3, deciduous. Flower: hypanthium bractlets 0; stamens 20--30; ovary inferior, chambers 2--5, 2-ovuled, styles 2--5, +- free. Fruit: pome, generally +- obovoid; flesh gritty from stone cells.
Species In Genus: +- 25 species: northern temperate. Etymology: (Latin: pear) Note: Pyrus calleryana Dcne. (callery pear) possibly naturalized in California.
Unabridged Note: Pyrus calleryana Dcne. (callery pear), distinguished from Pyrus communis by its small fruits and curved stipules, frequently escapes from cultivation in eastern United States. In California, collections from Sacramento Co. are likely from rootstocks of abandoned pear trees, but a collection from Butte Co. is of escaped saplings, suggesting potential for more widespread escape in California.
eFlora Treatment Author: Michael A. Vincent

Pyrus communis L.
Habit: Plant +- thorny (escaped plants). Leaf: 2--7 cm, ovate to wide-ovate or -elliptic, hairy in youth, glabrous in age, teeth rounded; petiole 22--45 mm. Flower: petals 10--15 mm, white; odorous. Fruit: 3--15 cm, 2--12 cm diam, calyx persistent. Chromosomes: 2n=34.
Ecology: Disturbed places; Elevation: < 1600 m. Bioregional Distribution: NCoRO, n SNF, ScV, TR, PR, W&I, DMtns; Distribution Outside California: native to Eurasia. Flowering Time: Feb--Apr
eFlora Treatment Author: Michael A. Vincent
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Citation for this treatment: Michael A. Vincent 2012, Pyrus communis, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on October 21, 2018.

Citation for the whole project: Jepson Flora Project (eds.) 2018, Jepson eFlora,, accessed on October 21, 2018.

Pyrus communis
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© 2015 California Academy of Sciences
Pyrus communis
click for enlargement
© 2015 California Academy of Sciences
Pyrus communis
click for enlargement
© 2015 California Academy of Sciences
Pyrus communis
click for enlargement
© 2015 California Academy of Sciences

More photos of Pyrus communis in CalPhotos

Geographic subdivisions for Pyrus communis:
NCoRO, n SNF, ScV, TR, PR, W&I, DMtns;
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.