1. Family: Araceae Juss.
    1. Gonatopus Engl.

      1. This genus is accepted, and its native range is E. Tropical Africa to S. Africa.

    [FTEA]

    Araceae, S.J. Mayo. Flora of Tropical East Africa. 1985

    Inflorescences
    Spadix subequal to spathe, lower part bearing pistillate flowers, upper part cylindric to clavate, bearing staminate flowers, separated from pistillate part by short constricted zone bearing sterile flowers Inflorescences 1–several, appearing before leaf but often persisting during its early development, subtended by several cataphylls, borne on erect very short to long penduncles Spathe convolute in lower part, forming a subglobose, cylindric or suburceolate tube, upper part an oblong to elliptic expanded limb reflexed at maturity
    Flowers
    Flowers unisexual, with perigon of 4(–6) decussate, fleshy, truncate to cucullate tepals Staminate flowers with stamens connate into a tube surrounding a central, cylindric to clavate pistillode; anthers dehiscing by apical pores, often exserted above tepals at dehiscence Pistillate flowers usually lacking staminodes, occasionally a solitary subcylindric staminode present between tepals and ovary; pistil ± laterally compressed; ovary 2-locular; ovules solitary in each locule, attached to base of septum; style short, thick; stigma discoid-capitate
    Male
    Staminate flowers with stamens connate into a tube surrounding a central, cylindric to clavate pistillode; anthers dehiscing by apical pores, often exserted above tepals at dehiscence
    Female
    Pistillate flowers usually lacking staminodes, occasionally a solitary subcylindric staminode present between tepals and ovary; pistil ± laterally compressed; ovary 2-locular; ovules solitary in each locule, attached to base of septum; style short, thick; stigma discoid-capitate
    Fruits
    Berry ovoid-ellipsoid, fleshy, 1–2-seeded
    Seeds
    Seed ovoid-ellipsoid, without endosperm; embryo macropodal, meristem lateral, superficial; testa smooth.
    Habit
    Small to large, seasonally dormant, tuberous herbs
    Stem
    Stem an underground rhizome or subglobose tuber
    Leaves
    Leaf solitary, subtended by several basal cataphylls, glabrous, rarely pilose or scabrous; petiole pulvinate at base or centrally; blade broadly triangular to oblanceolate in outline, pinnately to quadri-pinnately lobed, ultimate lobes broadly elliptic to linear, often decurrent
    [CATE]

    CATE Araceae, 17 Dec 2011. araceae.e-monocot.org

    Distribution
    E. Trop. Africa to S. Africa.
    Diagnostic
    Seasonally dormant geophytes; leaf solitary; petioles geniculate apically or centrally; leaf blade usually trisect with the three main divisions further subdivided; flowers unisexual, perigoniate; tepals usually 4, free, thick, truncate. Differs from Zamioculcas in having bipinnatifid to quadripinnatifid leaf blades (at least in lower pinnae), and connate stamen filaments.
    General Description
    HABIT : Seasonally dormant herbs, stem subterranean, a subglobose tuber or a cylindric, horizontal rhizome. LEAF : solitary, rarely pilose or scabrous, preceded by lanceolate cataphylls. PETIOLE : geniculate basally or centrally. BLADE : usually trisect, rarely not ( G. petiolulatus), primary divisions trifid to trisect or pinnatifid, or pinnatisect to quadri-pinnatifid, pinnae geniculate at junction with rachis, ultimate lobes varying from linear to broad-elliptic, often decurrent; primary lateral veins of each lobe pinnate, forming arching submarginal collective vein, higher order venation reticulate. INFLORESCENCE : 1-4 in each floral sympodium, appearing before or with leaves, subtended by several cataphylls. PEDUNCLE : erect, very short to long. SPATHE : constricted between tube and blade, tube convolute, subglobose, cylindric or suburceolate, blade oblong to elliptic, reflexed at anthesis, marcescent. SPADIX : subequal to spathe, female zone subcylindric, separated from male zone by very short, constricted zone of sterile flowers, male zone longer than female, cylindric to clavate, fertile to apex. FLOWERS : unisexual, perigoniate; tepals 4(-6), in 2 decussate whorls, fleshy, truncate to ± cucullate. MALE FLOWER : stamens with connate filaments forming tube around central, cylindric to clavate pistillode, often exserted above tepals at anthesis, connective slender, thecae dehiscing by apical pore. POLLEN : extruded in strands, extended monosulcate or fully zonate, hamburger-shaped, large (mean 76 µm., range 73-79 µm.), exine thick, foveolate, the foveolae scattered or grouped in fossulae, apertural exine psilate to ± verrucate. FEMALE FLOWER : usually lacking staminodes, exceptionally 1 staminode present, ovary 2-locular, ovules 1 per locule, anatropous, placenta basal-axile, style thick, somewhat attenuate, stigma large, discoid-hemispheric. BERRY : ovoid-ellipsoid, 1-2-seeded, red or orange to yellow, or whitish. SEED : ovoid-ellipsoid, testa thin, smooth, embryo large, plumule lateral, superficial, endosperm absent.
    Habitat
    Tropical evergreen forest; geophytes, on forest floor, also in rocky crevices with humus deposits.

    Images

    Distribution

    Native to:

    Kenya, KwaZulu-Natal, Malawi, Mozambique, Northern Provinces, Swaziland, Tanzania, Zambia, Zaïre, Zimbabwe

    Gonatopus Engl. appears in other Kew resources:

    First published in A.L.P.de Candolle & A.C.P.de Candolle, Monogr. Phan. 2: 208 (1879)

    Accepted by

    • Govaerts, R. & Frodin, D.G. (2002). World Checklist and Bibliography of Araceae (and Acoraceae): 1-560. The Board of Trustees of the Royal Botanic Gardens, Kew.

    Literature

    Flora of Tropical East Africa
    • Bogner in Aroideana 1 (3): 72 (1979)
    • in E.P. 21 (IV. 23B): 306 (1905)
    • in Monogr. Phan. 2: 208 (1879)

    Sources

    CATE Araceae
    Haigh, A., Clark, B., Reynolds, L., Mayo, S.J., Croat, T.B., Lay, L., Boyce, P.C., Mora, M., Bogner, J., Sellaro, M., Wong, S.Y., Kostelac, C., Grayum, M.H., Keating, R.C., Ruckert, G., Naylor, M.F. and Hay, A., CATE Araceae, 17 Dec 2011.
    http://creativecommons.org/licenses/by-nc-sa/3.0

    Flora of Tropical East Africa
    Flora of Tropical East Africa
    http://creativecommons.org/licenses/by-nc-sa/3.0

    Kew Backbone Distributions
    The International Plant Names Index and World Checklist of Selected Plant Families 2019. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
    © Copyright 2017 World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

    Kew Names and Taxonomic Backbone
    The International Plant Names Index and World Checklist of Selected Plant Families 2019. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
    © Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0