Quercus havardii Rydb.
  • Bull. New York Bot. Gard.
  • Havard oak

Cite taxon page as 'WFO (2020): Quercus havardii Rydb. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-0000291071. Accessed on: 06 Apr 2020'

General Information

Shrubs , deciduous, low, forming clones 0.3-1.5 × 10 m, rhizomatous. Bark light gray, scaly-papery. Twigs brown or grayish, 1-2.5 mm diam., glabrous or densely short grayish or yellowish tomentulose, glabrate in age. Buds dark red-brown, subglobose, ca. 2 mm, sparsely pubescent. Leaves: petiole to 7 mm. Leaf blade green, often turning brownish with age, polymorphic, oblong or elliptic or sometimes lanceolate to oblanceolate or ovate to obovate, (30-)50-100 × (10-)20-50 mm, rather thick and hard, base rounded to cuneate, margins flat to revolute, at least some undulate, 2-3 rounded teeth on each side, secondary veins 5-8 on each side, much branched, apex broadly rounded, rarely acute; surfaces abaxially densely grayish or yellowish tomentulose or stellate-pubescent, sometimes only sparsely pubescent, secondary veins quite prominent, adaxially lustrous, very sparsely stellate-pubescent or glabrate, secondary veins very slightly if at all raised. Acorns solitary or paired, subsessile or on peduncle to 10(-18) mm; cup from deeply cup-shaped to goblet-shaped, 10-12 mm deep × 15-25 mm wide, enclosing 1/3-1/2 nut, base rounded or slightly constricted, margin very thin and smooth, scales reddish brown, triangular-ovate to long-acute, proximally moderately to markedly tuberculate, pubescent, often canescent, tips loosely appressed; nut brown, ovoid, 12-25 × 14-18 mm. Cotyledons distinct.

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



    Tucker, J. M. 1970. Studies in the Quercus undulata complex. IV. The contribution of Q. havardii. Amer. J. Bot. 57: 71-84.

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

    Other Local Names

    Havard oak

     Information From

    World Flora Online Data. 2017.
    • A CC0 1.0 Universal (CC0 1.0).
    Flora of North America @ efloras.org
    '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.
    • 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 Assessment
    BGCI. 2018. GlobalTreeSearch online database. Botanic Gardens Conservation International. Richmond, U.K. Available at www.bgci.org. Accessed on 30/11/2018.
    • D Botanic Gardens Conservation International
    International Union for Conservation of Nature v.3
    IUCN 2019. The IUCN Red List of Threatened Species. Version 2019-1.
    • E See IUCN Terms and conditions of use http://www.iucnredlist.org/info/terms-of-use
    International Union for Conservation of Nature
    IUCN 2016. IUCN Red List of Threatened Species. Version 2016-2
    • F All Rights Reserved