1. Family: Araceae Juss.
    1. Genus: Amorphophallus Blume ex Decne.
      1. Amorphophallus johnsonii N.E.Br.

        This species is accepted, and its native range is W. Tropical Africa.

    [FWTA]

    Araceae, F. N. Hepper. Flora of West Tropical Africa 3:1. 1968

    Tubers
    Tuber about the size of a flattened orange
    Spathe
    Spathe constricted, dark purple red, shortly stalked
    Leaves
    Leaves appearing after the inflorescence
    Petiole
    Petiole smooth brown-spotted
    Ecology
    In forest undergrowth.
    [CATE]

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

    General Description
    Tuber globose when young, otherwise flat globose, 3-10 x 1-4 cm, usually without offsets, rarely with short cylindrical offsets. LEAF up to 1.2 m high, fully developed after flowering. Petiole 20-40 cm long, 1-3 cm in diameter, pale green with dark green spots, smooth. Blade 35-100 cm in diameter; rachis only in higher division order narrowly and broad ellipticaly ('oval') winged; terminal leaflets very broadly elliptic ('breit oval') , 9-12 x 4-4.5 cm, tapering into a short and wide, up to 1 cm long point, dark green, midrib slightly raised and brownish. Cataphylls 2-3, ca. 5 cm, 11cm and 20-25 cm long, 2-6 cm in diameter, elongate to broadly elliptic ('oval'), somewhat transparent, pale green with irregular dark green sprinkling. INFLORESCENCE 40-141 cm high, long or shortly peduncled, appearing before the leaf. Peduncle 5-94 cm long, 1-2 cm in diameter; pale green background with whitish and dark green, irregularly formed spots; stands erect and solitary; the shoot of a leaf, still hidden by the cataphylls, is sometimes recognisable at the base. Spathe 12-21 cm long; arranged into a vase-like tube and an elongate, triangular, open limb by a clear constriction. Tube 5-10 x 4-7 cm, ovoid to conical; outside greenish; inside basally with congested, fleshy, purple to cream, hair-like emergences, these 2-3 mm long and on yellow green to dark green background; emergences extend up, at the most, to the upper end of the staminate zone. Open limb 11-14 cm long, long and acutely triangular; outside in the upper third brown purple, otherwise green or reddish brown; margin undulate, purple. Spadix sessile, 33-47 cm long, usually twice as long as the spathe. Pistillate zone cylindrical, 1.5-2.7 x 1-1.5 cm; depending on the size of the inflorescence, flowers partly congested or flowers distant; tissue compact. Staminate zone conical to club-shaped, 3-4 x 1-2 cm, flowers congested, tissue shredded. Appendix ± club-shaped, 27-40 cm long, 3-5 cm in diameter (basally), basally constricted, the first third wider than the staminate zone, then quickly tapering, red brown, surface weakly rugulose and with basal longitudinal furrows here and there. Staminodes absent; sterile zone between staminate and pistillate zone 0.3-1 cm wide; ratio of pistillate to staminate zone 0.5-0.6 : 1. Pistillate flowers 3-5 mm big, ovary ± globose, 2-3 x 2-3 mm, bi-(tri-)locular, green, ovule-attachment anatropous, placental pubescence present only between micropyle and placenta; stigma sessile, globose from above, arched from the side, wider than the ovary, 2 x 2.5-2.8 mm, deeply bi-(tri-)lobed, stigma lobes acute, conical to triangular, orange yellow. Staminate flowers 1-2 x 1.5 mm long; anthers cubical, bright yellow; filaments not visible or short, 0.2-0.3 mm long; pores apical, globose, one pore per theca; connective channelled. Pollen inaperturate, 48-57 x 40-52 µm, orange to yellow, exine smooth (psilate). INFRUCTESCENCE growing over 1 m high. Infructescence stalk 35-100 cm long, elongates significantly in shortly stalked specimens, light purple to green with dark olive green sprinkling. Infructescence cylindrical, 6-15 x 2-4 cm. Berries globose, 7 x 7 mm, two seeded, orange. Seeds flattened to broadly elliptic ('oval'), 6 x 5 mm, rough to smooth, with minute furrows. Smell of rotten leaf litter or grass.
    Phenology
    Flowers from (January-) March to June. Fruits from April to August.
    Diagnostic
    Basal inner side of the spathe with hair-like emergences; Inflorescence stipitate for 10 cm at the most; Stigma deeply bi-(tri-)lobbed; stigma lobes conical; stigma sessile and as broad as or broader than the ovary.
    Habitat
    The specimens with long peduncles in open tree savannas and savannas; there, also on Inselbergs. The specimens with a short peduncle in forest edges (gallery forests, insel forests) in the undergrowth, prefers sandy soils
    Distribution
    Western Guineo-Congolese region to the southern area of the Guineo-Congolese-Sudanese zone: from Guinea to Ghana, north to Mali and Burkina Faso
    [FWTA]

    Araceae, F. N. Hepper. Flora of West Tropical Africa 3:1. 1968

    Spathe
    Spathe yellow-green on outside, fringed bright purple inside
    Spadix
    Spadix brown.
    [CATE]
    Use
    The species is used in Ghana for snake bites and acute rhumatism.

    Images

    Distribution

    Native to:

    Benin, Burkina, Ghana, Guinea, Ivory Coast, Liberia, Mali

    Amorphophallus johnsonii N.E.Br. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Sep 14, 1995 Bally, P.R.O. [103], Ghana K000452190
    Sep 14, 1995 Bally, P.R.O. [103], Ghana K000452191
    Sep 14, 1995 Harley, W.J. [2036], Liberia K000452195
    Sep 14, 1995 Morton, J.K. [542], Ghana K000452179
    Sep 14, 1995 Hall, J.B. [1771], Ghana K000452178
    Sep 14, 1995 Hall, J.B. [2949], Ghana K000452181
    Sep 14, 1995 Hall, J.B. [2949], Ghana K000452182
    Sep 14, 1995 Hall, J.B. [2949], Ghana K000452183
    Sep 14, 1995 Hall, J.B. [2582], Ghana K000452184
    Sep 14, 1995 Hall, J.B. [43619], Ghana K000452188
    Sep 14, 1995 Hall, J.B. [43619], Ghana K000452189
    Sep 14, 1995 Hall, J.B. [2582], Ghana K000452193
    Sep 14, 1995 Johnson [643], Nigeria K000345955 Unknown type material
    Sep 14, 1995 Ghana K000345956
    Sep 14, 1995 Irvine, F.R. [1180], Ghana K000452180
    Sep 14, 1995 Irvine, F.R. [1180], Ghana K000452192
    Sep 14, 1995 Geerling, C. [2581], Côte d'Ivoire K000452197
    Sep 14, 1995 Aké Assi, L. [11774], Côte d'Ivoire K000452196
    Sep 14, 1995 Baldwin, J.T. Jr. [12601], Liberia K000452194
    Sep 14, 1995 Irvine, J.R. [482], Ghana K000452185
    Sep 14, 1995 Cox, A.G. [3215], Ghana K000452186
    Sep 14, 1995 Cox, A.G. [3215], Ghana K000452187
    Feb 2, 1995 Johnson [643], Nigeria K000345954 holotype
    Brenan, J.P.M. [8499], Nigeria 25434.000
    Brenan, J.P.M. [8554], Nigeria 27751.000
    Bogner, J. [228] 32050.000

    First published in D.Oliver & auct. suc. (eds.), Fl. Trop. Afr. 8: 156 (1901)

    Accepted by

    • Akoègninou, A., van der Burg, W.J. & van der Maesen, L.J.G. (eds.) (2006). Flore Analytique du Bénin: 1-1034. Backhuys Publishers.
    • Ittenbach, S. (2003). Revision der afrikanischen Arten de Gattung Amorphophallus (Araceae) Englera 25: 1-263.
    • 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.
    • Govaerts, R. (1995). World Checklist of Seed Plants 1(1, 2): 1-483, 1-529. MIM, Deurne.

    Literature

    Flora of West Tropical Africa
    • Engl. Pflanzenr. 4, 23C: 80. (1911)
    • in F.T.A. 8: 158 (1901)
    CATE Araceae
    • Ittenbach, S. 2003. Revision der afrikanischen Arten der Gattung Amorphophallus (Araceae). Englera. 25: 5-263
    Kew Backbone Distributions
    • Akoègninou, A., van der Burg, W.J. & van der Maesen, L.J.G. (eds.) (2006). Flore Analytique du Bénin: 1-1034. Backhuys Publishers.
    • Ittenbach, S. (2003). Revision der afrikanischen Arten de Gattung Amorphophallus (Araceae) Englera 25: 1-263.

    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 West Tropical Africa
    Flora of West Tropical 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.
    Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/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