Betula pendula Roth
  • Tent. Fl. Germ.
  • Weeping birch, European white birch, silver birch, bouleau pleureur


This taxon is accepted by Betulaceae
Notes: More details could be found in The Plant List v.1.1. Originally in The Plant List v.1.0

General Information

Trees to 25 m tall; bark grayish white, exfoliating in sheets. Branches usually pendulous, dark brown, slender, glabrous, shiny; branchlets brown, slender, glabrous, sparsely resinous glandular or not. Petiole slender, 2-3 cm; leaf blade triangular-ovate or rhombic-ovate, 3-7.5 × 1.5-6 cm, abaxially densely resinous punctate, adaxially glabrous, base truncate, broadly cuneate, or cuneate, margin coarsely or incised doubly serrate, apex acuminate or caudate-acuminate; lateral veins 6-8 on each side of midvein. Female inflorescence oblong or oblong-cylindric, 1-3.3 cm × 8-10 mm; peduncle pendulous, 1-2 cm; bracts 5-6 mm, densely pubescent, ciliate, 3-lobed, middle lobe ovate or triangular-ovate, lateral lobes recurved, slightly longer than middle lobe. Nutlet obovate-elliptic, ca. 2 × 1 mm, sparsely pubescent, with membranous wings slightly longer than and ca. 2 × as wide as nutlet. Fl. Jun-Jul, fr. Jul-Aug. 2n = 28, (42), 56.

  • Provided by: [B].Flora Of CHina @ efloras.org
    • Source: [
    • 1
    • ]. 

    Trees , to 25 m; trunks usually several, crowns spreading. Bark of mature trunks and branches creamy to silvery white, smooth, exfoliating as long strands; lenticels dark, horizontally expanded. Branches pendulous; twigs glabrous, usually dotted with small resinous glands. Leaf blade broadly ovate to rhombic with 5--18 pairs of lateral veins, 3--7 × 2.5--5 cm, base cuneate, rarely truncate, margins coarsely and sharply doubly serrate, apex acuminate; surfaces abaxially glabrous to sparsely pubescent, covered with minute, resinous glands. Infructescences erect to nearly pendulous, cylindric, 2--3.5 × 0.6--1 cm, shattering with fruits in fall; scales adaxially sparsely pubescent, lobes diverging at middle, central lobe obtuse, much shorter than lateral lobes, lateral lobes broad, rounded, extended. Samaras with wings much broader than body, broadest near center, extended beyond body apically. 2 n = 28, 56.

  • Provided by: [D].Flora of North America @ efloras.org
    • Source: [
    • 2
    • ]. 

    "Occasionally escapes from cult. and would key to B. populifolia. It has drooping twigs; middle-sized trunks are beset with vertical, diamond-shaped, rough black marks that eventually coalesce."

  • Provided by: [C].New York Botanical Garden
    • Source: [
    • 3
    • ]. 

    Synonyms

    Other Local Names

    NameLanguageCountry
    Weeping birch, European white birch, silver birch, bouleau pleureur

     Information From

    Betulaceae
    World Flora Online Data. 2017.
    • A CC0 1.0 Universal (CC0 1.0).
    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.
    • B Missouri Botanical Garden
    New York Botanical Garden
    Descriptions of plants should be attributed to the full citation for each individual article, chapter or book that is the source for each record, which should include the authors of original publication.
    • C Content licensed under Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License
    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.
    • D Flora of North America Association
    World Flora Online consortium
    http://www.worldfloraonline.org/organisation/WFO
    World Flora Online Data. 2018.
    • E CC0 1.0 Universal (CC0 1.0).
    International Union for Conservation of Nature v.3
    https://www.iucnredlist.org/
    IUCN 2019. The IUCN Red List of Threatened Species. Version 2019-1.
    • F See IUCN Terms and conditions of use http://www.iucnredlist.org/info/terms-of-use
    Global Tree Assessment
    http://www.bgci.org/
    BGCI. 2018. GlobalTreeSearch online database. Botanic Gardens Conservation International. Richmond, U.K. Available at www.bgci.org. Accessed on 30/11/2018.
    • G Botanic Gardens Conservation International
    International Union for Conservation of Nature
    https://www.iucn.org/
    IUCN 2016. IUCN Red List of Threatened Species. Version 2016-2
    • H All Rights Reserved