1. Family: Araceae Juss.
    1. Stylochaeton Lepr.

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

    [FTEA]

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

    Habit
    Seasonally dormant herbs
    Stem
    Stem an underground rhizome, sometimes stoloniferous; roots thick, spindle-shaped, tuberous
    Leaves
    Leaves solitary-several, radical, subtended by several basal cataphylls; petiole not pulvinate apically; basal sheaths often purplish spotted or banded; blade lanceolate, ovate, cordate-sagittate, sagittate or hastate-sagittate
    Inflorescences
    Inflorescences produced before or with leaves, borne at or below ground-level on short peduncles, usually subtended by several basal cataphylls Spathe tubular with connate margins in lower part, often inflated at extreme base, upper part a lanceolate-elliptic ± expanded limb, or unexpanded with a lateral slit, often somewhat or greatly thickened Spadix shorter than spathe, lower part bearing pistillate flowers, upper part longer, bearing staminate flowers, often separated from pistillate part by interstice bearing sterile flowers
    Flowers
    Flowers unisexual, surrounded by ± glandular cup-shaped perigon Staminate flowers: perigon often with very thick fleshy margins; stamens 2–7; filaments subulate, rarely thickened apically; anthers dehiscing by lateral slits; connective slender, sometimes ± thickened; central pistillode usually present Pistillate flowers closely appressed, borne in single basal whorl or in spirals; perigon usually greatly thickened and glandular or mealy on upper surface; ovary 1–2-locular; ovules 1–many per locule; placentation basal, parietal or axile; style thick, ± cylindric, exserted beyond perigon; stigma capitate to broadly discoid and massive
    Male
    Staminate flowers: perigon often with very thick fleshy margins; stamens 2–7; filaments subulate, rarely thickened apically; anthers dehiscing by lateral slits; connective slender, sometimes ± thickened; central pistillode usually present
    Female
    Pistillate flowers closely appressed, borne in single basal whorl or in spirals; perigon usually greatly thickened and glandular or mealy on upper surface; ovary 1–2-locular; ovules 1–many per locule; placentation basal, parietal or axile; style thick, ± cylindric, exserted beyond perigon; stigma capitate to broadly discoid and massive
    Fruits
    Berries borne at or below ground-level in globose to cylindric infructescence, often rugose, fleshy, 1–few-seeded
    Seeds
    Seeds with copious endosperm.
    [CATE]

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

    Distribution
    Trop. & S. Africa.
    Diagnostic
    Seasonally dormant or evergreen, rhizomatous geophytes; cataphylls often conspicuously mottled; leaf blade linear to cordate, sagittate or hastate, fine venation reticulate; inflorescence appearing before or with the leaves, borne at or partially below ground level; flowers unisexual, perigoniate, perigone a single cup-like structure, more conspicuous in female flowers; male flower usually with central pistillode, filaments slender, free. Differs from Zamioculcas and Gonatopus in having entire (not compound) leaves, tepals connate into a cup and spathe tube margins connate.
    Habitat
    Tropical humid forests (evergreen species, e.g. S. zenkeri), tropical savannas and deciduous forests (seasonally dormant species, e.g. S. natalensis); geophytes.
    General Description
    Laticifers absent. HABIT : seasonally dormant or evergreen herbs, rhizome subterranean, horizontal to erect, sometimes stoloniferous, roots thick, spindle-shaped, often very fleshy, almost tuberous. LEAVES : 1 to several, cataphylls often conspicuously mottled and apically auriculate, sometimes persistent as fibrous mass. PETIOLE : sheath short to long, often purplish-spotted or banded. BLADE : lanceolate, ovate, ± rounded, cordate-sagittate, sagittate, hastate-sagittate or hastate; primary lateral veins pinnate or mostly arising basally, long-arcuate and running into marginal vein, lowermost primaries sometimes retrorse and then ascending, higher order venation reticulate. INFLORESCENCE : 1-4 in each floral sympodium, appearing before or with leaves, borne at or partially below ground level. PEDUNCLE : short, much shorter than petiole. SPATHE : erect, marcescent, tube : margins connate, often ventricose at extreme base, sometimes constricted between a lower and an upper inflated zone, rarely entire spathe narrowly cylindric, blade : lanceolate-elliptic, ± gaping or opening only by narrow longitudinal slit, often much thickened. SPADIX : free, shorter than spathe, female zone densely flowered, sometimes contiguous with male zone, often separated by axis bearing a few (to many) sterile or bisexual flowers, male zone fertile to apex. FLOWERS : unisexual, perigoniate, borne in single basal whorl or in spirals; perigone a single cup-like (urceolate) structure. MALE FLOWER : perigone often with very thick, fleshy margins, stamens 2-7, free, filaments filiform, long, rarely much thickened apically, connective slender, sometimes slightly thickened, thecae oblong, dehiscing by longitudinal slit, pistillode central, cylindric to conoid, sometimes absent. POLLEN : inaperturate, or sometimes vestigially monosulcate, ellipsoid, large (mean 53 µm., range 43-58 µm.), exine foveolate-reticulate or subreticulate. FEMALE FLOWER : perigone usually greatly thickened and sticky-glandular or farinaceous on upper surface, ovary 1-4-locular, ovules 1-many per locule, anatropous, placenta basal, parietal or axile, style thick, ± cylindric, exserted beyond perigone, stigma capitate to broadly discoid and massive. BERRY : borne at or below ground level in globose to cylindric infructescence, often rugose, fleshy, 1-few-seeded. SEED : ovoid to ellipsoid, slightly compressed, testa black, thin, costate, embryo axile, elongate, endosperm copious.

    Images

    Distribution

    Native to:

    Angola, Benin, Burkina, Cameroon, Central African Repu, Chad, Congo, Equatorial Guinea, Ethiopia, Gabon, Guinea, Guinea-Bissau, Ivory Coast, Kenya, KwaZulu-Natal, Liberia, Malawi, Mali, Mauritania, Mozambique, Niger, Nigeria, Northern Provinces, Senegal, Sierra Leone, Somalia, Sudan, Swaziland, Tanzania, Togo, Zambia, Zaïre, Zimbabwe

    Stylochaeton Lepr. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Bogner, J. [248], Tanzania 34231.000

    First published in Ann. Sci. Nat., Bot., sér. 2, 2: 184 (1834)

    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 West Tropical Africa
    • F.T.A. 8: 187.
    • in Ann. Sci. Nat., Sér. 2, 2: 184 (1834)
    Flora of Tropical East Africa
    • Engl. in E.P. 73 (IV. 23F): 29 (1920), nom. et orth. cons. prop.
    • in Ann. Sci. Nat., sér. 2, 2: 184 (1834), as ‘Stylochaeton’

    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

    Herbarium Catalogue Specimens
    'The Herbarium Catalogue, Royal Botanic Gardens, Kew. Published on the Internet http://www.kew.org/herbcat [accessed on Day Month Year]'. Please enter the date on which you consulted the system.

    Kew Backbone Distributions
    The International Plant Names Index and World Checklist of Selected Plant Families 2020. 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 2020. 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