Ottelia alismoides (L.) Pers.
  • Syn. Pl.
  • Duck-lettuce


Cite taxon page as 'WFO (2020): Ottelia alismoides (L.) Pers. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-0000769606. Accessed on: 30 Oct 2020'

General Information

Petiole varying greatly in length according to depth of water; leaf blade wholly submerged, varying greatly in shape and size, usually broadly ovate, ovate-elliptic, suborbicular, cordate, or sometimes lanceolate, ca. 20 × 18 cm or more, membranous. Flowers bisexual or plants occasionally dioecious-polygamous. Spathe 2.5-4 × 1.5-2.5 cm, 2- or 3-lobed at apex, with 3-6 longitudinal wings. Flowers solitary, sessile. Petals white, slightly purple, or bluish. Stamens 3-9(-12); filaments glandular hairy; anthers narrowly oblong, 3-4 mm. Ovary subglobose, with 3-9(or 10) carpels; styles 6-10, deeply 2-lobed. Fruit 2-5 × 0.8-1.8 cm. Seeds fusiform, 1-2 mm, densely hairy. Fl. and fr. Apr-Oct. 2n = 44.

  • Provided by: [B].Flora Of CHina @ efloras.org
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    Leaves submersed; blade lanceolate to widely ovate, to 17 ´ to 20 cm, margins entire to crisped. Inflorescences 1-flowered; spathes 3--10-winged. Flowers: sepals10--15 ´ 2--9 mm; stamens 3--12; ovary 1, 3--9-carpellate. Fruits 15--40 mm. Seeds to 2000.

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

    Monoecious, dioecious or hermaphrodite, annual or perennial.

  • Provided by: [D].Plants Of the World Online Portal - FTEA
    • Source: [
    • 4
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    Nodal scales 4–10 per leaf, ovoid to conical.

  • Provided by: [D].Plants Of the World Online Portal - FTEA
    • Source: [
    • 4
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    Mature leaves petiolate; blade submerged or floating, elliptic to widely ovate, 8–17 cm. long, 5.7–20 cm. wide, acute to obtuse or rounded, cuneate to cordate or somewhat involute at base, smooth, with 2–10 prominent longitudinal veins connected by cross-veins, together with many smaller longitudinal veins; leaf-margins entire or denticulate.

  • Provided by: [D].Plants Of the World Online Portal - FTEA
    • Source: [
    • 4
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    Juvenile leaves linear to obovate or spathulate.

  • Provided by: [D].Plants Of the World Online Portal - FTEA
    • Source: [
    • 4
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    Stems corm-like, simple or rarely forked.

  • Provided by: [D].Plants Of the World Online Portal - FTEA
    • Source: [
    • 4
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    Ovary of 3–10 carpels, narrowly ellipsoid, 0.7–2.2 cm. long, ± 0.7 cm. wide; perianth-tube 0.6–0.8 cm. long, styles 3–10; stigmas 6–20, up to 6 mm. long, yellowish.

  • Provided by: [D].Plants Of the World Online Portal - FTEA
    • Source: [
    • 4
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    Fruit ellipsoid to ovoid, rarely cylindric, 1.5–4(–5) cm. long, 1–2 cm. wide, opening by decay of the pericarp.

  • Provided by: [D].Plants Of the World Online Portal - FTEA
    • Source: [
    • 4
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    Petals ovate to orbicular, 1.8–3 cm. long, 0.5–1 cm. wide, rounded or obcordate, white, white with yellow base, yellow, pink to purple.

  • Provided by: [D].Plants Of the World Online Portal - FTEA
    • Source: [
    • 4
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    Stamens 3–12; anthers 2.5–4.5 mm. long, yellowish; filaments up to 6 mm. long; staminodes filiform or 2-lobed, up to 4.8 cm. long.

  • Provided by: [D].Plants Of the World Online Portal - FTEA
    • Source: [
    • 4
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    Seeds narrowly cylindric, 0.9–1.3 mm. long, 0.3–0.5 mm. wide, dark purple to black, with longitudinal striations.

  • Provided by: [D].Plants Of the World Online Portal - FTEA
    • Source: [
    • 4
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    Male flowers several per spathe, with pedicels up to 7 cm. long; ♀ and hermaphrodite flowers sessile.

  • Provided by: [D].Plants Of the World Online Portal - FTEA
    • Source: [
    • 4
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    Sepals narrowly triangular to ovate, 0.6–2.4 cm. long, 1.8–5.7(–9) mm. wide, subobtuse to rounded, green, the margin often hyaline.

  • Provided by: [D].Plants Of the World Online Portal - FTEA
    • Source: [
    • 4
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    Spathe: peduncle 10–50 cm. long, 0.17–0.5 cm. wide; body of spathe submerged, sometimes slightly inflated, cylindric to ellipsoid or urceolate, 2–6-lobed at the apex, with 3–12 crisped or wavy wings or ribs.

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

    Literature

    SELECTED REFERENCE

    Dike, D. H. 1969. Contributions to the Biology of Ottelia alismoides (Hydrocharitaceae). M. S. thesis. University of Southwestern Louisiana.

  • Provided by: [A].Flora of North America @ efloras.org
    • Source: [
    • 6
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    Other Local Names

    NameLanguageCountry
    Duck-lettuce

     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
    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
    Hydrocharitaceae
    World Flora Online Data. 2017.
    • C CC0 1.0 Universal (CC0 1.0).
    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
    • D
    World Flora Online consortium
    http://www.worldfloraonline.org/organisation/WFO
    World Flora Online Data. 2018.
    • E 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
    • F 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.
    • G See IUCN Terms and conditions of use http://www.iucnredlist.org/info/terms-of-use