1. Family: Araceae Juss.
    1. Genus: Amorphophallus Blume ex Decne.
      1. Amorphophallus preussii (Engl.) N.E.Br.

        This species is accepted, and its native range is W. Cameroon.

    [CATE]

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

    Habitat
    Undergrowth plant of primary, shady forests, often in the vicinity of highland streams, on heavy soils and black vulcano earth
    Diagnostic
    Basal inner side of the spathe with hair-like emergences; Basal inner side [of the spathe] with slightly raised ribs and with dot-like or hair-like papillae.
    Phenology
    Flowers in January, fruits from January - May.
    Distribution
    Guineo-Congolese region: endemic in Cameroon
    General Description
    Tuber 3.5-10 x 4-6 cm, flattened globose, with a tendency to [have] a deep depression, outside orange brown to brown, inside yellowish, forming offsets. LEAF solitary, 60-80 cm high. Petiole 35-70 cm long; 0.5-2 cm in diameter; smooth; dark greenish with dark brown to black green, broadly elliptic ('oval') spots, these overlap each other frequently. Blade 40-80 cm in diameter, with 24-40 cm long main segments, which divide again at an interval 4-6 cm from the base; rachis narrowly winged only from 2nd division leaflets onwards. Terminal leaflets elongate to elliptic, lanceolate or inversly egg-shaped; the basal ones somewhat askew; 6-28 x 2-7 cm; attenuaring in a clearly offset 1.5-2.5 cm long point; underside pale green with reddish brown mid-vein and reddish side-veins; upper side dark green; margin smooth to slightly undulate. Basal leaflets broadly elliptic ('oval') and loosely dispersed. Cataphylls unknown. INFLORESCENCE solitary; emerging before the leaf, 20-75 cm high. Peduncle 12-60 cm long, whitish, pale green at the base, with light purple elliptical spots. Spathe 8-15 cm long, erect, arranged without a distinct constriction into a cylindrical tube and a broadly elliptic ('oval') to triangularly attenuating open limb. Tube cylindrical to conical; outside green, purple to whitish, with purple veins and light purple spots; inside greenish, yellowish to whitich; inside basally 1.5-2 cm high, purple red, this region with very short, hair-like emergences or papillae (0.3-0.5 mm long), then greenish, yellowish to whitish, with slightly raised veins. Open limb erect, broadly elliptic ('oval') to triangular, acutely attenuating, green, purple to white with purple veins and light purple spots. Spadix sessile, 6-8 cm long, shorter than the spathe. Pistillate zone cylindrical, 1-1.2 x 1-1.2 cm, flowers incompletly congested. Staminate zone cylindrical, 1.5 x 0.5-1 cm, flowers congested. Appendix cylindrical, erect, 3.5-5 cm long, 1-2 cm in diameter, fatter than the staminate zone; surface slightly rugulose, grainy to rough, pale yellow to brownish, basally constricted, ends in a blunt to rounded tip. Staminodes absent; sterile zone between staminate and pistillate zone absent; ratio of pistillate to staminate zone 0.66-0.8 : 1. Pistillate flowers 2-2.5 x 2-2.8 mm long; ovary spherical to ovoid, 1.5 x 2.3-2.5 cm, (uni-)bilocular, one ovule-attachment per locule, mid-green to pale green; style very short, 0.4-0.8 mm, dark green; stigma button-shaped, broadly elliptic ('oval') form the side, circular from above, unlobed, stigmatic surface papillose, 1-1.2 mm in diameter, pale yellow. Staminate flowers with 3-4 stamens, cream to white; filaments sometimes basally fused into a pillar-like Columna, 0.5-1 x 1-1.7 mm; pores broadly elliptic ('oval') to circular, apical, one pore per thecae. Pollen inaperturate, 41 x 32 µm, ovoid ('oval'), exine finely verrucate. INFRUCTESCENCE 25-40 cm long; infructescence stalk erect, as the peduncle, 10-35 cm long, brownish, smooth; infructescence globose, ovoid ('oval') to cylindrical, 2-5-6 x 2-3.5 cm. Berries globose to coffe bean shaped, 0.5-0.7 x 0.5-1 cm, one to two seeded, orange. Seeds ovoid and somewhat angular, smooth, with microscopic small papillae and longitudinal ribs, 0.5 x 0.3-0.4 cm. Smell unknown.
    [FWTA]

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

    Spathe
    Spathe yellow-green, purple at the base
    Ecology
    Near upland stream in forest.

    Images

    Distribution

    Native to:

    Cameroon

    Amorphophallus preussii (Engl.) N.E.Br. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Feb 5, 1996 Letouzey, R. [14444], Cameroon K000499387
    Sep 1, 1995 Cable, S. [697], Cameroon K000107750
    Sep 1, 1995 Cable, S. [1200], Cameroon K000107751
    Sep 1, 1995 Cable, S. [867], Cameroon K000107752
    Cable, S. [1200], Cameroon 60520.000
    Cable, S. [697], Cameroon 60618.000
    Cable, S. [1200], Cameroon 61709.000
    Feb 2, 1995 Preuss [588], Cameroon Hydrosme preussii K000345963

    First published in D.Oliver & auct. suc. (eds.), Fl. Trop. Afr. 8: 152 (1901)

    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

    Flora of West Tropical Africa
    • Engl., Pflanzenr. 23C: 95, fig. 34.
    • in F.T.A. 8: 152 (1901)
    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

    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