Equisetaceae Michx. ex DC.
  • Essai Propr. Méd. Pl. 49. 1804. (Jul 1804)
  • Horsetail Family


Cite taxon page as 'WFO (2021): Equisetaceae Michx. ex DC. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-7000000217. Accessed on: 17 Oct 2021'

General Information

Plants with jointed stems, with distinct nodes. Leaves small, whorled, fused into sheaths; tips remaining free, toothlike. Sporangia borne on peltate sporophylls aggregated in cones 0.3--10 cm. Spores green (except white in hybrids), all 1 kind. Gametophytes green, terrestrial, unisexual; male gametophytes smaller than female.

  • Provided by: [D].Flora of North America @ efloras.org
    • Source: [
    • 3
    • ]. 

    Plants perennial, homosporous, small to large, terrestrial, aquatic, or in shallow water. Rhizome creeping, sometimes erect or ascending, blackish brown, branched, with nodes; nodes with roots densely covered with trichomes or glabrous. Aerial stems annual or perennial, erect, monomorphic or dimorphic, green but lower nodes often blackish brown, terete, with nodes, hollow and with longitudinal canals in center, often with silica tubercles on epidermis, unbranched or with whorled branches; internodes with longitudinal ridges and grooves. Leaves reduced, scalelike, whorled; lower portion fused to form a collarlike sheath around base of internode; upper portion lobed. Strobili conelike, terminal on stem or branches, terete or ellipsoid, sometimes stalked; sporophylls whorled, peltate, hexagonal in surface view, imbricate, with 5-10 sporangia per sporophyll. Sporangia saclike, in whorls on abaxial side of sporophylls. Spores green, subglobose or globose, 35-70 μm in diam., each with 4 spirally curled, white filaments (elaters) that uncurl upon drying, without colpi, with thin and transparent perispores; perispores with granular ornamentation. Gametophytes growing at or near soil surface, green, disk- to cushion-shaped, irregularly lobed. x = 108.

  • Provided by: [C].Flora Of CHina @ efloras.org
    • Source: [
    • 4
    • ]. 

    Morphology

    Terrestrial plants

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

    Aerial stems erect, uniform or of two kinds, fertile and sterile, hollow, ribbed; arising from creeping subterranean, often very deep, rhizomes; producing whorls of branches at the nodes; some species produce tubers borne singly or in rows like strings of beads, from the rhizomes near the roots

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

    Leaves reduced, in whorls, those of each whorl being united to form a sheath around the stem at each node

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

    Aerial stems erect, hollow, ribbed, arising from creeping subterranean rhizomatous stems and producing whorls of branches at the nodes

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

    Leaves reduced to a many-toothed short sheath at each node

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

    Plantes terrestres, tout au plus palustres.\n\t\t\t\n\t\t\t\t Sporophytes': 2 n, herbacés, vivaces, rhizomateux; faisceaux collatéraux, fermés.'Feuilles'verticillées, petites, squamiformes, indivises, uninervées, celles d'un même verticille unies à la base en une gaine entourant la tige ou le rameau et terminée par des lobes ou des dents ; base de la gaine foliaire éventuellement transpercée par les rameaux axillaires.'Sporophylles (= clypéoles) en verticilles groupés en strobiles au sommet des tiges ou des rameaux.\n\t\t\t\n\t\t\t\t Spores toutes semblables.\n\t\t\t\n\t\t\t\t Gamétophytes : n, le plus souvent unisexués, épigés, verts, rubanés-aplatis, souvent un peu ramifiés-digités, les femelles plus volumineux que les mâles, tous fixés au sol par des rhizoïdes ventraux 1-cellulaires; anthéridies donnant des anthérozoïdes gros, à cils multiples.\n\t\t\tFamille actuellement monogénérique, existant dès le Carbonifère inférieur.

  • Provided by: [B].Flore d'Afrique Centrale
    • Source: [
    • 5
    • ]. 

    Included Genus

    Other Local Names

    NameLanguageCountry
    Horsetail Family

     Information From

    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
    • A
    Flore d'Afrique Centrale
    https://www.floredafriquecentrale.be
    • B http://creativecommons.org/licenses/by/4.0/ Attribution 4.0 International (CC BY 4.0)
    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.
    • C Missouri Botanical Garden
    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
    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
    Equisetaceae
    World Flora Online Data. 2017.
    • 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).