Helinus E. Mey. ex Endl.
  • Gen. Pl. 1102. 1840.


Cite taxon page as 'WFO (2021): Helinus E. Mey. ex Endl. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-4000017248. Accessed on: 24 Oct 2021'

Morphology

Climbing shrubs or woody vines or lianes (or seeming to be mere shrubs but not in East Africa)

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    Leaves alternate, petiolate, the uppermost ones (subtending umbels) sometimes much reduced and bract-like; blades ovate or lanceolate, entire, at base rounded or cordate, at apex acute or rounded, essentially penninerved or vaguely 3–5-nerved at base

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    Tendrils present (or absent but not in East Africa), circinnate, axillary

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    Umbels axillary, (1–)3–12-flowered, only 1 flower or rarely 2 flowers per umbel setting fruit; peduncles usually rather slender and elongate, sometimes surpassing the subtending leaf; pedicels short to elongate, filiform

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    Stipules linear, caducous

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    Flowers 5-merous, perfect, epigynous at all stages

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    Cup broadly campanulate

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    Sepals deltoid, often with very thin white margins

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    Petals oblanceolate and somewhat concave toward the distal end, yellowish or greenish white, arcuate ascending at anthesis

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    Stamens as long as petals

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    Fruit a schizocarpous capsule with a thinly coriaceous rind (mesocarp and other exterior tissues) which eventually dries; endocarp thin, crustaceous, schizocarpous, separating into 3 mericarps each of which releases its seed by a sudden opening of the ventral suture.

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    Style 3-lobed about half the length

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    Ovary inferior at all stages of development, 3-celled (reportedly sometimes 2-celled but not in East Africa)

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    Disk massive, thickened around and adherent to the ovary

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    Seeds black, plano-convex.

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    Fruit an obovoid or globose capsule, splitting into 3 cocci which at length dehisce.

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    Ovary inferior, 3-locular;ovules 1 in each loculus; style 3-fid or obscurely 3-lobed (sometimes heterostylous).

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    Petals 5, cucullate, inserted at the margin of the disk.

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    Sepals 5.

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    Disk flat, filling the receptacle.

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    Stamens 5, equalling the petals, inserted at the margin of the disk.

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    Inflorescence a 1-several-flowered pedunculate axillary umbel.

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    Leaves alternate, petiolate; lamina penninerved, margin entire; stipules subulate, caducous.

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    Receptacle obconic, adnate to the ovary.

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    Flowers bisexual, pedicellate.

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    Shrublets or climbing shrubs; branches with coiled tendrils.

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    Arbrisseaux'sarmenteux, munis de vrilles circinées.'Feuilles'alternes, pétiolées, entières, à petites stipules caduques.'Inflorescences'en ombelles axillaires ou faussement terminales, souvent pédonculées.'Fleurs' ☿; réceptacle obconique, adné à l'ovaire; calice à 5 dents étalées; pétales 5, en capuchon, insérés sous le bord du disque; étamines 5, subégales aux pétales et logées dans ceux-ci; disque large ou étroit, entier; ovaire infère, à 3 loges 1-ovulées; style long ou court (hétérostylie), à 3 lobes stigmatiques dressés ou réfractés.'Capsules'obovoïdes ou globuleuses, portant au sommet la cicatrice du disque, se séparant en 3 coques à déhiscence élastique.'Graines 3, aplaties, plan-convexes, ovales, brillantes; albumen charnu; cotylédons grands et plats; radicule courte, infère.\n\t\t\t\tGenre répandu dans les régions tropicales de l'Ancien Monde, comprenant 6 espèces dont 3 en Afrique tropicale et 1 à Madagascar, 2 espèces au Congo belge.

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      Bibliography

     Information From

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