Pyrus L.
  • Sp. Pl. 1: 479. 1753. (1 May 1753)
  • Pear, poirier [Latin pirum, pear]


Cite taxon page as 'WFO (2021): Pyrus L. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-4000032328. Accessed on: 22 Oct 2021'

General Information

17. Pyrus L.

Por F.R.Barrie.

Arbustoso árboles, inermes o con aguijones. Hojas deciduas; simples, alternas,cartáceas, los márgenes enteros, denticulados o dentados; estípulaspersistentes? Inflorescencias racemosas. Flores apareciendo con las hojas oantes de estas; pecioladas; hipanto cupuliforme; bractéolas ausentes; sépalos5; pétalos 5; estambres 20-30; ovario ínfero; carpelos 2-5, connatos basalmente.Frutos en pomos piriformes con un centro cartilaginoso, la pulpa con numerosasesclereidas; semillas 1-2 por carpelo. Aprox. 75 spp. Eurasia, Canadá y EstadosUnidos. Ampliamente cultivado en todo el mundo, 1 sp. cultivada en Mesoamérica.

  • Provided by: [B].Flora Mesoamericana
    • Source: [
    • 1
    • 4
    • ]. 

    Trees or shrubs, deciduous, rarely semievergreen, sometimes armed. Leaves alternate, simple, petiolate, stipulate, involute in bud, venation camptodromous, margin serrate or entire, rarely lobed. Inflorescences corymbose-racemose. Flowers precocious or synantherous. Hypanthium cupular. Sepals 5, reflexed or spreading. Petals 5, white, rarely pink, clawed. Stamens 15–30; anthers usually dark red or purple. Ovary inferior, 2–5-loculed, with 2 ovules per locule; styles 2–5, free. Pome with juicy pulp, rich in stone cells, 2–5-celled, with cartilaginous endocarp (core), with persistent or caducous sepals; seeds black or blackish brown, seed coat cartilaginous; cotyledons plano-convex.

  • Provided by: [D].Flora Of CHina @ efloras.org
    • Source: [
    • 2
    • ]. 

    Trees, ?often pyramidal or oval in silhouette?, (50–)80–300 dm. Stems 1–many, erect; bark gray, reddish or orange-brown, ?smooth, older with gray or blackish rectangular plates?; short shoots sometimes present; thorns present or absent; young branches glabrous or tomentose; ?buds ovoid, narrowly ovoid, or triangular-ovoid, apex obtuse or acuminate, glabrous or sparsely to densely tomentose?. Leaves deciduous, cauline, simple; stipules sometimes caducous, free, lanceolate, margins serrate or entire; petiole present; blade suborbiculate, ± ovate or ovate-lanceolate to elliptic, oblong, or obovate, (2–)5–9(–12) cm, firm or leathery, margins flat, serrate, crenate, serrulate, crenulate, or entire, venation pinnate, surfaces hairy or glabrous. Inflorescences terminal ?on short branches?, 4–9-flowered, racemes or simple corymbs, umbel-like, ?with short persistent axis?, glabrous or tomentose; bracts absent; bracteoles absent. Pedicels present. Flowers developing with or before leaves, perianth and androecium epigynous, 15–45 mm diam.; hypanthium campanulate or cupular, 3–5 mm diam., interior usually pubescent, exterior hairy or glabrous; sepals 5, reflexed, lanceolate or triangular-lanceolate to triangular or triangular-ovate; petals 5, white or creamy, ovate or ovate-elliptic to obovate or obovate-elliptic, ?base short-clawed, apex rounded?; stamens 20, equal to or slightly shorter than petals; carpels 2–5, mostly connate, fully adnate to hypanthium, glabrous, styles terminal, distinct (constricted basally by hypanthium), ?± equal to stamens?; ovules 2. Fruits pomes, brown, red, green, or yellow, often dotted, globose, subglobose, ovoid, obovoid, or pyriform, 8–120 mm diam., glabrous; ?fleshy with abundant stone or grit cells?; hypanthium persistent; sepals persistent or deciduous, reflexed; carpels cartilaginous; styles persistent or not. Seeds 2–5(–10) per fruit. x = 34.

  • Provided by: [C].Flora of North America @ efloras.org
    • Source: [
    • 3
    • ]. 

    Literature

    SELECTED REFERENCES Browicz, K. 1993. Conspect and chorology of the genus Pyrus L. Abor. Kórnickie 38: 17–33. Challice, J. S. and M. N. Westwood. 1973. Numerical taxonomic studies of the genus Pyrus using both chemical and botanical characters. Bot. J. Linn. Soc. 67: 121–148. Lee, S. H. 1948. A taxonomic survey of the oriental pears. Proc. Amer. Soc. Hort. Sci. 51: 152–156. Rubtsov, G. A. 1944. Geographical distribution of the genus Pyrus and trends and factors in its evolution. Amer. Midl. Naturalist 78: 358–366. Terpó, A. 1985. Studies in the taxonomy and grouping of Pyrus species. Feddes Repert. 96: 73–87.

  • Provided by: [C].Flora of North America @ efloras.org
    • Source: [
    • 3
    • ]. 

    Included Species

    Other Local Names

    NameLanguageCountry
    Pear, poirier [Latin pirum, pear]

     Information From

    MBG Floras Images
    http://www.tropicos.org/ImageSearch.aspx
    Flora images. Missouri Botanical Garden. Accessed on Jun. 2018.
    • A Missouri Botanical Garden
    Flora Mesoamericana
    http://www.mobot.org/MOBOT/fm/
    Gerrit Davidse, Mario Sousa Sánchez, A. O. Chater, Universidad Nacional Autónoma de México. Instituto de Biología, Missouri Botanical Garden, Natural History Museum (London, England) UNAM, 1994
    • B Missouri Botanical Garden
    Flora of North America @ efloras.org
    http://www.efloras.org/flora_page.aspx?flora_id=1
    'Flora of North America @ eFloras (2008). Published on the Internet http://www.efloras.org/flora_page.aspx?flora_id=1 [accessed August 2016]' Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
    • C Flora of North America Association
    Flora Of CHina @ efloras.org
    http://www.efloras.org/flora_page.aspx?flora_id=2
    'Flora of China @ eFloras (2008). Published on the Internet http://www.efloras.org/flora_page.aspx?flora_id=2 [accessed August 2016]' Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
    • D Missouri Botanical Garden
    Rosaceae
    CC0 1.0 Universal (CC0 1.0). https://creativecommons.org/publicdomain/zero/1.0
    • E CC0 1.0 Universal (CC0 1.0).
    World Flora Online consortium
    http://www.worldfloraonline.org/organisation/WFO
    World Flora Online Data. 2018.
    • F CC0 1.0 Universal (CC0 1.0).