Psilotaceae J.W.Griff. & Henfr.
  • Microgr. Dict. 540. 1855. (1 Nov 1855)
  • Whisk fern Family


Cite taxon page as 'WFO (2019): Psilotaceae J.W.Griff. & Henfr. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-7000000502. Accessed on: 16 Nov 2019'

General Information

Plants perennial, terrestrial or epiphytic, with corallike, rhizoid-bearing, branched, subterranean axes. Roots absent. Aerial shoots simple or dichotomously branched; appendages leaflike or bractlike, alternate to subopposite, veinless or 1-veined, less than 1 cm. Synangia globose, of 2--3 fused, homosporous eusporangia, solitary in axils of shoot appendages, dehiscing loculicidally. Spores many, reniform, not green. Gametophytes subterranean, mycotrophic, fleshy, elongate, and branched.

  • Provided by: [A].Flora of North America @ efloras.org
    • Source: [
    • 4
    • ]. 

    Plants small to medium-sized, epiphytic or on rocks. Rhizomes creeping, brown, with protostele or siphonostele, bearing rhizoids; roots absent. Stems erect or pendulous, green, unbranched or dichotomously or pinnately branched; branches ridged to sulcate or complanate. Leaves small or rudimentary, with a single vein (microphylls) or lacking veins (enations), spirally or distichously alternate, sessile or subsessile, dimorphic; trophophylls scalelike and subulate-triangular, or lanceolate to narrowly ovate; sporophylls deeply bifid. Sporangia appearing solitary at or above bases of sporophylls, large, 2- or 3-lobed (sometimes interpreted as synangia of 2 or 3 unlobed sporangia), thick-walled, lacking an annulus, each lobe dehiscing longitudinally by a slit. Spores reniform, monolete, many (> 1000) per sporangium, exospore translucent, rugulate to foveolate. Gametophytes subterranean (Psilotum), non-photosynthetic, cylindrical, mycorrhizal. x = 52.

  • Provided by: [D].Flora Of CHina @ efloras.org
    • Source: [
    • 5
    • ]. 

    Morphology

    Epiphytic perennial herbs; rootless with dichotomous mycorrhizal rhizomes

  • Provided by: [B].Plants Of the World Online Portal - FWTA
    • Source: [
    • 1
    • ]. 

    Leaves represented by minute subulate, scale–like, spirally arranged appendages

  • Provided by: [B].Plants Of the World Online Portal - FWTA
    • Source: [
    • 1
    • ]. 

    Stems erect (in W.African species), photosynthetic, green, angular, dichotomous

  • Provided by: [B].Plants Of the World Online Portal - FWTA
    • Source: [
    • 1
    • ]. 

    Terrestrial or epiphytic

  • Provided by: [C].Plants Of the World Online Portal - FTEA
    • Source: [
    • 2
    • ]. 

    Leaves small, simple, scale-like, ovate, spaced, spirally disposed, rigid, somewhat spiniform with distinct or very poorly developed bundles

  • Provided by: [C].Plants Of the World Online Portal - FTEA
    • Source: [
    • 2
    • ]. 

    Aerial stems chlorophyllose, simple or dichotomously branched produced from non-chlorophyllous mycorrhizal rootless rhizome-like horizontal axes

  • Provided by: [E].Plants Of the World Online Portal - FZ
    • Source: [
    • 3
    • ]. 

    Included Genus

    Other Local Names

    NameLanguageCountry
    Whisk fern 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
    Plants Of the World Online Portal - FWTA
    https://www.kew.org/science/who-we-are-and-what-we-do/strategic-outputs-2020/plants-of-the-world-online
    http://www.plantsoftheworldonline.org/terms-and-conditions
    • B The Trustees of the Royal Botanic Gardens, Kew
    Plants Of the World Online Portal - FTEA
    https://www.kew.org/science/who-we-are-and-what-we-do/strategic-outputs-2020/plants-of-the-world-online
    http://www.plantsoftheworldonline.org/terms-and-conditions
    • C
    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
    Plants Of the World Online Portal - FZ
    https://www.kew.org/science/who-we-are-and-what-we-do/strategic-outputs-2020/plants-of-the-world-online
    http://www.plantsoftheworldonline.org/terms-and-conditions
    • E
    Psilotaceae
    • F CC0 1.0 Universal (CC0 1.0).
    World Flora Online consortium
    http://www.worldfloraonline.org/organisation/WFO
    World Flora Online Data. 2018.
    • G CC0 1.0 Universal (CC0 1.0).