Aponogeton vallisnerioides Baker
  • Trans. Linn. Soc. London, Bot.


Cite taxon page as 'WFO (2019): Aponogeton vallisnerioides Baker. Published on the Internet; http://www.worldfloraonline.org/taxon/wfo-0000761018. Accessed on: 21 Oct 2019'

Morphology

Flowers white or pale violet.

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    Aquatic in pools on laterite

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    Follicles green, 4.5–6 mm. long including a ± 1 mm. long beak.

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    Plants monoecious.

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    Seeds 1.8–2.5 mm. long and 0.4–0.7 mm. wide, narrowly oblong-lanceolate with distinct longitudinal ridges (made of the loose outer testa), greenish with the brownish inner testa visible beneath.

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    Tuber globular to conical, usually only 5–10 mm. (rarely to 20 mm.) in diameter; lower half greyish to greenish without roots; upper half with very numerous roots.

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    Stamens 6, 1.5–2 mm. long; filaments whitish, widened towards the base; anthers 0.4–0.8 mm. long and 0.3–0.5 mm. wide, greyish violet to blackish, but pollen yellow.

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    Leaves very numerous (often 25–50 or more on robust plants), sessile, ligulate with obtuse tips, often 10–20 cm. long and 4–8 mm. wide on larger plants, only 5–10 cm. long and 1.5–4 mm. wide on smaller specimens, without a distinct midrib, but with 7 or 9 indistinct parallel lateral nerves.

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    Ovaries 3, green, with 6–8 ovules.

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    Fig. 1.

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    Tepals 2, white and glossy, rarely with a pinkish or mauve tinge, particularly below, oval, 3–6 mm. long and usually 2–3 mm. wide, caducous, with several nerves.

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    Spike usually 2–5 cm. long and ±10 mm. wide with tepals spreading, the upper part recurved or spirally twisted; flowers inserted on only one side of the axis.

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    Flowers white or with a slight violet tinge, drying a warm yellowish brown, densely set in unbranched unilateral spikes on 5–30 cm. long peduncles (depending on the depth of the water); spathe 12–18 mm. long, usually persistent when flowering, caducous when fruiting.

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     Information From

    Aponogetonaceae
    World Flora Online Data. 2017.
    • A 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
    • B
    Plants Of the World Online Portal - FWTA
    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 The Trustees of the Royal Botanic Gardens, Kew
    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 v.3
    https://www.iucnredlist.org/
    IUCN 2019. The IUCN Red List of Threatened Species. Version 2019-1.
    • E See IUCN Terms and conditions of use http://www.iucnredlist.org/info/terms-of-use
    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