Betula occidentalis Hook.
  • Fl. Bor.-Amer.
  • Water birch, river birch

Cite taxon page as 'WFO (2020): Betula occidentalis Hook. Published on the Internet; Accessed on: 26 Oct 2020'

General Information

Shrubs , spreading, to 10 m. Bark dark reddish brown to bronze, smooth, close, not readily exfoliating; lenticels pale, horizontally expanded. Twigs without the odor or taste of wintergreen, glabrous to sparsely pubescent, covered with conspicuous, reddish, resinous glands. Leaf blade broadly ovate to rhombic-ovate with 2--6 pairs of lateral veins, 2--5.8 × 1--4.5 cm, base truncate to rounded or cuneate, margins sharply and coarsely serrate or irregularly doubly serrate, teeth mostly long and sharp, basal portion untoothed, apex acute to occasionally short-acuminate; surfaces abaxially sparsely to moderately pubescent, covered with minute, resinous glands. Infructescences erect to nearly pendulous, cylindric, 2--3(--3.9) × 0.8--1.5 cm, shattering with fruits in fall; scales glabrous, ciliate, lobes diverging at middle, central lobe narrower and longer than ascending lateral lobes. Samaras with wings broader than body, broadest near summit, extended beyond body apically. 2 n = 28.

  • Provided by: [B].Flora of North America @
    • Source: [
    • 1
    • ]. 

    Other Local Names

    Water birch, river birch

     Information From

    World Flora Online Data. 2017.
    • A CC0 1.0 Universal (CC0 1.0).
    Flora of North America @
    'Flora of North America @ eFloras (2008). Published on the Internet [accessed August 2016]' Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
    • B Flora of North America Association
    World Flora Online consortium
    World Flora Online Data. 2018.
    • C CC0 1.0 Universal (CC0 1.0).
    Global Tree Search
    BGCI. 2018. GlobalTreeSearch online database. Botanic Gardens Conservation International. Richmond, U.K. Available at Accessed on 30/11/2018.
    • D Botanic Gardens Conservation International