Hydrocotyle mannii Hook.f.
  • J. Proc. Linn. Soc., Bot.


Cite taxon page as 'WFO (2021): Hydrocotyle mannii Hook.f. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-0000726495. Accessed on: 01 Mar 2021'

Morphology

A more or less pilose creeping herb

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    Slender trailing perennial, rooting at the lower nodes with the flowering tips frequently ascending and ± erect, rising to as much as ± 30 cm. or the height of surrounding herbs or grass, rootlets sparse to dense, lower internodes 0.6–8 cm., stem slender, greenish to red or brownish, striate.

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    Leaves not peltate, the lamina reniform or almost round, ± 7–50 mm. in diameter, 5–9-lobed with rounded to acute, bluntly to sharply or irregularly denticulate lobes, pilose on both surfaces though sometimes sparingly so above; petiole slender, 0.7–10(–20) cm., pilose throughout or (especially when very long) in the upper 2/3; stipules broadly ovate or oblong-ovate, hyaline (the lower becoming brownish and membranous), entire or shortly denticulate, without purplish streaks, ± 1–2.5 mm.

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    Fruit laterally compressed, yellowish green (sometimes reddish when ripe) ± 1.5–1.8 × 1 mm., the ribs filiform, very narrow but clearly prominent; stylopodia very flat, ± obsolete; styles spreading, slender, ± 0.4–0.6 mm.

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    Petals greenish to white, lanceolate, 0.5–0.75 mm.

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    Inflorescence a rounded capitate umbel of (8–)10–25(–30) flowers, 3–5 mm. in diameter; peduncle (0–)0.3–9(–15) cm., pilose to glabrous; involucre of ± 3–5 broadly or narrowly oblong, membranous, 0.5–1 mm. bracts; pedicels very short; bracteoles narrowly spathulate.

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    Petals greenish-white.

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    Inflorescence a subcapitate umbel; peduncle rather variable in length, but commonly c. 1/2 the length of the subtending petiole. Umbel of 10–30 flowers on very short to obsolete rays.

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    Fruit c. 1·0 × 1·5 mm., broadly ellipsoid, laterally compressed, brownish when ripe; apex and base distinctly emarginate; stylopodium depressed; styles short, spreading; stigmas slightly clavate; lateral ribs not strongly developed.

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    Leaves long-petiolate, 1–2 (3) at each node, circular to reniform, basal sinus very narrow.

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    Stem prostrate, terete, glabrous or with a few scattered hairs.

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    Lamina 1–5 × 0·75–4·5 cm., with 5–12 lobes, the sinuses between the lobes varying from shallow to extending halfway to the centre of the leaf; lobe margins subentire to crenate-dentate; inferior surface with numerous bristly hairs, especially on the veins; superior surface with similar hairs, which may be only very sparsely distributed.

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    Petioles 1·5–11 cm. long, sub-glabrous to hirsute, with numerous long, white, bristly hairs especially near the tip.

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    Delicate creeping perennial herb, rooting at the nodes.

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

    In damp montane habitats

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     Information From

    Araliaceae
    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
    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
    • D The Trustees of the Royal Botanic Gardens, Kew
    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