Ceratophyllum submersum L.
  • Sp. Pl. ed. 2


Cite taxon page as 'WFO (2020): Ceratophyllum submersum L. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-0000832288. Accessed on: 31 Oct 2020'

Morphology

Fruit usually markedly laterally flattened with a marginal rim or wing.

  • Provided by: [B].Plants Of the World Online Portal - FZ
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    Aquatic herb similar to Ceratophyllum demersum, but usually more delicate, differing as follows: Leaves usually lighter green, 2–4 cm. long, branching dichotomously 3–4 times (rarely twice in some whorls), usually rather fine, 0.1–0.3 mm. thick, to 2.5 mm. thick in lower segments, marginal teeth few, inconspicuous, often absent from lower segments, up to 0.1–0.2 mm. long.

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    Male flowers to 2 mm. in diam.; anthers 0.6–0.8 x 0.4–0.7 mm., often smaller and relatively broader than in C. demersum.

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    Female perianth lobes (1.5) 1.8–2 x 0.1–0.3 mm., relatively narrower and usually longer than in C. demersum.

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    Mature fruit with apical spine less than 1 up to 9 mm.; surface sometimes with few large warts or spines.

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    Female perianth-segments usually longer, (1.5–)1.8–2 mm. long, 0.1–0.3 mm. wide, and relatively narrower (length (5–)7–10 times width).

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    Male flowers up to 2 mm. in diameter; mature anthers 0.6–0.8 mm. long, 0.4–0.7 mm. wide (length 1–1.5 times width).

  • Provided by: [C].Plants Of the World Online Portal - FTEA
    • Source: [
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    Leaves usually lighter green, 2–4 cm. long, branched dichotomously 3–4 times, sometimes one part of leaf branched more than another, rarely a few leaves of whorl only twice branched, usually rather fine, 0.1–0.3 mm. in diameter, but lower 1–2 segments sometimes swollen and up to 2.5 mm. across, marginal spiny teeth always minute, less than 0.1 or 0.2 mm., on lower 2 segments few or absent, few or more rarely numerous on final 2 segments.

  • Provided by: [C].Plants Of the World Online Portal - FTEA
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    Very similar to C. demersum in form, but usually more delicate and filamentous in appearance, differing as follows.

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

    Ceratophyllaceae
    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
    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
    World Flora Online consortium
    http://www.worldfloraonline.org/organisation/WFO
    World Flora Online Data. 2018.
    • D CC0 1.0 Universal (CC0 1.0).
    International Union for Conservation of Nature
    https://www.iucn.org/
    IUCN 2016. IUCN Red List of Threatened Species. Version 2016-2
    • E All Rights Reserved
    International Union for Conservation of Nature v.3
    https://www.iucnredlist.org/
    IUCN 2019. The IUCN Red List of Threatened Species. Version 2019-1.
    • F See IUCN Terms and conditions of use http://www.iucnredlist.org/info/terms-of-use