Elatine L.
  • Sp. Pl. 1: 367. 1753. (1 May 1753)
  • Waterwort, élatine [Greek name for a plant with firlike leaves]


Cite taxon page as 'WFO (2020): Elatine L. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-4000013143. Accessed on: 24 Nov 2020'

General Information

Herbs annual, aquatic. Stem prostrate, slender, rooting at nodes. Leaves opposite or verticillate, shortly petiolate; leaf blade small, margin usually entire. Flowers usually only 1 per node, very small. Sepals 2-4, united at base, membranous, apex subacute. Petals 2-4, longer than sepals, apex obtuse. Stamens 1 or 2 × as many as petals. Ovary globose, compressed, 2-4-loculed, apex truncate; ovules numerous; styles 2-4; stigmas capitate. Capsule membranous, 2-4-septicidal. Seeds straight, curved, or horseshoe-shaped, surface reticulate-striate with hexagonal or elliptic pits.

  • Provided by: [C].Flora Of CHina @ efloras.org
    • Herbs, submersed or emergent aquatic, glabrous. Stems erect, ascending, decumbent, or prostrate, with longitudinal air spaces, rooting at nodes. Leaves: stipules membranous; petiole present or absent; blade margins entire, with hydathodes. Inflorescences: flowers usually solitary, sometimes 2[–3] per node. Pedicels present or absent. Flowers: sepals 2–4, connate basally, equal or 1 smaller, not carinate, apex obtuse; petals (0 or) 2–4, apex obtuse; stamens [0–]1–8; pistil 2–4-carpellate, ovary 2–4-locular, apex truncate; styles 2–4; stigmas 2–4. Capsules membranous. Seeds 2–33[–44] per locule, brown to yellowish brown, straight or curved (nearly circular in E. californica), surface with hexagonal, rectangular, elliptic, or ± round pits (pits oriented with longer dimension at right angles to length of seed). x = 9.

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

      "Sep and pet each 2–4; stamens as many (in our spp.) or twice as many as the sep; ovary 2–4-locular, the placentas axile or basal-axile; seeds several per cell, cylindric, minutely areolate; small aquatic annuals with inconspicuous axillary fls and thin- walled frs. 20, widespread."

    • Provided by: [E].New York Botanical Garden
      • Source: [
      • 6
      • ]. 

      Morphology

      Leaves opposite or more rarely verticillate; stipules present.

    • Provided by: [B].Plants Of the World Online Portal - FZ
      • Source: [
      • 4
      • ]. 

      Small glabrous herbs, aquatic or found in damp situations.

    • Provided by: [B].Plants Of the World Online Portal - FZ
      • Source: [
      • 4
      • ]. 

      Fruit globose; somewhat depressed at the apex, wall membranous; seeds numerous, straight or curved; testa with a scalariform reticulation.

    • Provided by: [B].Plants Of the World Online Portal - FZ
      • Source: [
      • 4
      • ]. 

      Ovary globose, 3–4-locular; styles minute, 3–4, spreading.

    • Provided by: [B].Plants Of the World Online Portal - FZ
      • Source: [
      • 4
      • ]. 

      Stamens as many as the petals or twice the number.

    • Provided by: [B].Plants Of the World Online Portal - FZ
      • Source: [
      • 4
      • ]. 

      Petals 2–4, free, white or pink.

    • Provided by: [B].Plants Of the World Online Portal - FZ
      • Source: [
      • 4
      • ]. 

      Sepals 2–4 shortly connate at the base, obtuse.

    • Provided by: [B].Plants Of the World Online Portal - FZ
      • Source: [
      • 4
      • ]. 

      Flowers minute, solitary in the leaf axils.

    • Provided by: [B].Plants Of the World Online Portal - FZ
      • Source: [
      • 4
      • ]. 

      Literature

      SELECTED REFERENCES Duncan, W. H. 1964. New Elatine populations in the southeastern United States. Rhodora 66: 47–53. Fassett, N. C. 1939. Notes from the herbarium of the University of Wisconsin. No. 17. Elatine and other aquatics. Rhodora 41: 367–377. Fernald, M. L. 1917. The genus Elatine in eastern North America. Rhodora 19: 10–15. Fernald, M. L. 1941b. Elatine americana and E. triandra. Rhodora 43: 208–211.

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

      Other Local Names

      NameLanguageCountry
      Waterwort, élatine [Greek name for a plant with firlike leaves]

        Bibliography

       Information From

      Elatinaceae
      World Flora Online Data. 2017.
      • A CC0 1.0 Universal (CC0 1.0).
      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
      • B
      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
      New York Botanical Garden
      Descriptions of plants should be attributed to the full citation for each individual article, chapter or book that is the source for each record, which should include the authors of original publication.
      • E Content licensed under Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License
      World Flora Online consortium
      http://www.worldfloraonline.org/organisation/WFO
      World Flora Online Data. 2018.
      • F CC0 1.0 Universal (CC0 1.0).