Thonningia Vahl
  • Skr. Naturhist.-Selsk. 6: 124. 1810.


Cite taxon page as 'WFO (2020): Thonningia Vahl. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-4000038241. Accessed on: 04 Dec 2020'

Morphology

Infructescence a swollen hemisphere, bearing minute 1-seeded achenes.

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    Male flowers pedicellate; perianth-segments 2–6, linear, spirally arranged; anthers 3–6, linear-elongate, united but with apices finally free, 2-thecous and extrorsely dehiscing

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    Female flowers linear-prismatic, densely crowded, perianth tubular, obscurely 2–3-lobed; style 1, exserted

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    Inflorescence-bearing stems breaking through buds on the tuber, leaving a short lobed volva basally

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    Tuber rhizome-like, cylindrical, branched, swollen at point of contact with host-root

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    Inflorescence unbranched, spadix-like with axis obconical, terminally convex, bearing numerous flowers

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    Stem with numerous spirally arranged triangular-lanceolate scale-leaves

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    Plants dioecious

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    Male flowers: fewer and less densely packed in head than female; perianth segments spirally arranged, unequal in length and extent of attachment to synandrium; stamens united into a synandrium.

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    Female flowers: numerous and densely packed in head; perianth cylindrical, irregularly 2–4-lobed; style long-exserted; ovary inferior, 1-locular.

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    Fruits 1-seeded achenes aggregated into a hemispherical infructescence.

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    Dioecious or rarely monoecious plants.

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    Tubers irregularly shaped, emitting horizontal, cylindrical, branched rhizomes.

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    Inflorescences of involucrate heads of flowers from buds on tuber, unbranched, pedunculate to sessile; peduncles densely covered with imbricate scales; receptacle of male inflorescences flat to slightly convex, of female inflorescences conical to hemispherical.

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    Parasite'formant, aux points d'attache avec les racines de l'hôte, des tubercules émettant des rhizomatoïdes ± ramifiés, cylindriques, ± velus et contenant une substance céracée (balanophorine).'Inflorescences'solitaires, en capitules involucres généralement pédoncules; pédoncules et involucres des capitules à écailles imbriquées, coriaces et rigides.'Fleurs'♂ généralement à l'aisselle de bractées subulées; périgone à 2-6 tépales linéaires; étamines 3-5, obstémones, soudées en colonne; anthères généralement 2-loculaires, en synandries et à déhiscence longitudinale.'Fleurs'♀ libres ou légèrement soudées latéralement, à périgone tubulaire épigyne; style exsert, simple et filiforme; ovule solitaire, adhérent à la paroi de l'ovaire.'Akènes .\n\t\t\t\tSix espèces en Afrique et 1 à Madagascar.

  • Provided by: [D].Flore d'Afrique Centrale
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    Included Species

      Bibliography

     Information From

    Balanophoraceae
    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
    Flore d'Afrique Centrale
    https://www.floredafriquecentrale.be
    • D http://creativecommons.org/licenses/by/4.0/ Attribution 4.0 International (CC BY 4.0)
    World Flora Online consortium
    http://www.worldfloraonline.org/organisation/WFO
    World Flora Online Data. 2018.
    • E CC0 1.0 Universal (CC0 1.0).