Ginkgoaceae Engl.
  • Nat. Pflanzenfam. 1: 19. 1897. (16 Jul 1897)
  • Maidenhair Tree Family


Cite taxon page as 'WFO (2021): Ginkgoaceae Engl. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-7000000249. Accessed on: 26 Oct 2021'

General Information

Trees deciduous, dioecious; trunk tall, densely branched; branchlets dimorphic: both long and short. Leaves sparsely and spirally arranged on long branchlets, fasciculate on short branchlets, long petiolate, flabellate, venation parallel, close, dichotomous, open but with rare anastomoses, base broadly cuneate, margin straight, entire, apex 2-lobed or notched. Reproductive structures produced in clusters in axils of scalelike leaves at apex of short branchlets before leaves expand. Pollen cones pedunculate, pendulous, catkinlike; microsporophylls numerous, spirally and rather sparsely arranged; microsporangia 2, elliptic; pollen sacs longitudinally dehiscent. Ovules borne on a long, dichotomously branched peduncle sometimes dividing into 3-5 terminal forks; each fork discoid at apex, bearing an erect, sessile ovule; usually only 1 seed ripening per peduncle. Seeds long pedunculate, pendulous, drupelike, with a single integument differentiated into a fleshy, succulent sarcotesta, a bony sclerotesta, and a membranous endotesta; female gametophyte tissue abundant. Cotyledons 2(or 3). Germination hypogeal. 2n = 24*.

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

    Trees , deciduous, dioecious (possibly rarely monoecious). Bark gray, furrowed, with flattened ridges. Long shoots and short (spur) shoots present. Roots fibrous to woody. Leaves simple, alternate to fascicled, stomates abaxial; apices deeply cleft to truncate; petioles equal to or exceeding blades; resin canals absent. Pollen cones borne on spurs, catkinlike; sporophylls distributed along axis; bracts absent; pollen spheric, not winged. Seed cones absent; ovules 2, pedunculate, subtended by collar believed to comprise 2 modified megasporophylls, borne on spurs. Seeds with fleshy outer coat, inner coat hard; cotyledons 2--3.

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

    Literature

    SELECTED REFERENCES

    Page, C. N. 1990. Coniferophytina: Ginkgoaceae. In: K. Kubitzki et al., eds. 1990+. The Families and Genera of Vascular Plants. 1+ vol. Berlin etc. Vol. 1, pp. 284--289.

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

    Included Genus

    Other Local Names

    NameLanguageCountry
    Maidenhair Tree Family

     Information From

    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.
    • A 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.
    • B Missouri Botanical Garden
    Ginkgoaceae
    World Flora Online Data. 2017.
    • C CC0 1.0 Universal (CC0 1.0).
    World Flora Online consortium
    http://www.worldfloraonline.org/organisation/WFO
    World Flora Online Data. 2018.
    • D CC0 1.0 Universal (CC0 1.0).