Alisma L.
  • Sp. Pl. 1: 342. 1753. (1 May 1753)
  • Water-plantain [ancient Greek name, adopted by Linnaeus from Dioscorides]


Cite taxon page as 'WFO (2020): Alisma L. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-4000001209. Accessed on: 24 Sep 2020'

General Information

Herbs, aquatic or of marshes, usually with a tuber. Leaves aerial, floating, or submerged, all basal, petiolate, margin entire. Inflorescences paniculate or occasionally umbellate; branches whorled, each one usually secondarily branched and with bracts at base. Flowers bisexual. Petals usually larger than sepals. Stamens 6. Carpels numerous in a single whorl, free, each with 1 ovule. Achene laterally compressed, 1- or 2-grooved or canaliculate abaxially, with a usually adaxial beak.

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

    Herbs, perennial, submersed, floating-leaved, emersed, glabrous; rhizomes often present; stolons absent; corms absent; tubers absent. Roots not septate. Leaves sessile or petiolate; petiole triangular; blade with translucent markings absent, linear to ovate, base attenuate to rounded, margins entire, apex obtuse to acute. Inflorescences panicles, of 2--10 whorls, erect, emersed, rarely submersed; bracts delicate, smooth, apex acuminate, surfaces smooth. Flowers bisexual; pedicels ascending; bracts subtending pedicels, lanceolate, shorter than pedicels, apex acuminate; receptacle flattened; sepals erect, not sculptured, herbaceous; petals pink or white, entire; stamens 6--9, filaments filiform, glabrous; pistils 15--20, in ring around margin of flattened receptacle, not radiating in starlike pattern, distinct; ovules 1; styles lateral. Fruits without longitudinal ribs, strongly laterally compressed, abaxial wings absent, lateral wings absent, abaxially 2--3-ribbed, abaxial keel absent, glands absent. x = 7.

  • Provided by: [D].Flora of North America @ efloras.org
    • Source: [
    • 5
    • ]. 

    Morphology

    Inflorescence compound, pyramidal; flowers and branches in whorls of 4 or more, each whorl subtended by 3 bracts and several smaller bracteoles

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

    Flowers bisexual

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

    Perennial aquatic or marsh herbs

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

    Leaves erect; leaf-blade linear-lanceolate to ovate; apex acute; base decurrent to cordate

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

    Achenes many, in a whorl on the flat receptacle, compressed laterally, ridged dorsally.

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

    Petals 3, larger than the sepals

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

    Sepals 3, appressed in the fruiting state

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

    Carpels many, free; style ventral, erect or curved; stigma papillose; ovules solitary, basal

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

    Stamens 6; filaments filiform

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

    Literature

    SELECTED REFERENCES

    Björkquist, I. 1968. Studies in Alisma L. II. Chromosome studies, crossing experiments and taxonomy. Opera Bot. 19: 1--138. Hendricks, A. J. 1957. A revision of the genus Alisma (Dill.) L. Amer. Midl. Naturalist 58: 470--493. Rubtzoff, P. 1964. Notes on the genus Alisma. Leafl. W. Bot. 10: 90--95. Voss, E. G. 1958. Confusion in Alisma. Taxon 7: 130--133.

  • Provided by: [D].Flora of North America @ efloras.org
    • Source: [
    • 5
    • ]. 

    Other Local Names

    NameLanguageCountry
    Water-plantain [ancient Greek name, adopted by Linnaeus from Dioscorides]

     Information From

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