1. Family: Araceae Juss.
    1. Genus: Amorphophallus Blume ex Decne.
      1. Amorphophallus gracilior Hutch.

        This species is accepted, and its native range is S. Benin to SW. Nigeria.

    [CATE]

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

    Phenology
    Flowering from January to February.
    Distribution
    Guineo-Congolese region: endemic in the border area of Benin and Nigeria
    General Description
    Tuber 2.5-10 x 1-4 cm, flattened to globose, rooting shallowly. LEAF ca. 40-70 cm high. Petiole ca. 12-60 cm long. Blade ca. 28-50 cm in diameter; rachis not winged or only narrowly winged in the distal regions of the leaf; terminal leaflets elongate-broadly elliptic ('länglich-oval') to egg-shaped, 9-15 x 3-4 cm, tapering into a 1 cm long point. Cataphylls 5; the two inner ones 2-7 cm long, ('basal drei ca. 1 cm lang'). INFLORESCENCE 20-40 cm high, appearing before the leaf. Peduncle 15-32 cm long, slender, extremely thin, 1.5-3 cm in diameter, smooth. Spathe slender, 3-7 x 1.5-2.5 cm, arranged without a constriction into a minute tube and an acute triangular open limb. Tube 2-3 x 1.5-2 cm, short cylindrical, outside grey to green to cream with green to purple veins; inside basally smooth to slightly rough due to dot-like warts, with slightly raised veins, brownish to purple; open limb 3-5 cm long, tilted erect to nodding, narrow, acute, margin smooth, grey to green to cream and speckled with greenish. Spadix sessile, 6-8 cm long, somewhat longer than the spathe. Pistillate zone cylindrical, 0.3-0.7 x 0.4 cm, one to maximum two rows of flowers. Staminate zone cylindrical, 0.5-1.5 x 0.4 cm, stamens in loosely dispersed groups. Appendix 4-6 cm long, club-shaped, basally narrowly cylindrical and not constricted, apically thickened like a club, can apically be rolled up like a fern leaf, grey to grey brown, surface rough to rugulose. Staminodes as sterile anthers in the basal region of the appendix; sterile zone between pistillate and staminate zone absent; ratio of pistillate to staminate zone 0.46-0.6 : 1. Pistillate flowers 1-2 cm long, ovary 0.8-1.3 x 1-2 mm, globose-ovoid ('rundlich-oval') to slightly pressed globose, unilocular, one basal ovule-attachment; stigma sessile to subsessile, knoblike to obovoid, 0.3-0.8 mm in diameter. Staminate flowers 1-1.5 mm long, 3(-4) stamens forming one flower; anthers free, ovoid, ca. 1 mm long; filaments 0.3-0.5 mm long, (2-)3(-4) fused together basally into a platform like "Columna", often fused all the way to the anthers and forming a pillar-like Columna; pores apical, slit-like, one per theca. Pollen inaperturate, exine spinose (echinate). INFRUCTESCENCE globose, ca. 3 cm in diameter. Berries 1 x 1 cm, globose, single seeded, red. Smell not known.
    Diagnostic
    Style barely visible or absent, unilocular, appendix club-shaped.
    Habitat
    In primary rainforests and flood plains which are flooded for several months, and in swamps. On clay or loam soils with sparse undergrowth.Together with Raphia, Cynometra vogelii, Symphonia, Garcinia, Cleistopholis, Spondianthus, Mitragyna, Ficus vogeliana, Calamus (in sched. Onochie FHI 20689 and Jones & Onochie FHI 16958).

    Images

    Distribution

    Native to:

    Benin, Nigeria

    Amorphophallus gracilior Hutch. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Oct 7, 1995 Killick, H.J. [56564], Nigeria K000499379

    First published in Bull. Misc. Inform. Kew 1939: 245 (1939)

    Accepted by

    • 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

    CATE Araceae
    • Ittenbach, S. 2003. Revision der afrikanischen Arten der Gattung Amorphophallus (Araceae). Englera. 25: 5-263

    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

    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