1. Family: Araceae Juss.
    1. Genus: Amorphophallus Blume ex Decne.
      1. Amorphophallus canaliculatus Ittenb., Hett. & Lobin

        This species is accepted, and its native range is N. Gabon.

    [CATE]

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

    Distribution
    NW Gabon, only known from one site
    General Description
    Tuber subglobose. brown. 12 x 8 cm, no offset development. LEAF to 0.6-1 m long; petiole 40-70 x 1.5-2.5 cm. dark purplish brown with blackish-purplish spots, smooth; lamina to 50-60 cm in diameter, rhachises winged distal from the first leaflets; terminal leaflets elongate-oval, 9-12 x 3 cm. attenuate into a 1.5 cm long tip. INFLORESCENCE: Cataphylls 2, membranous, the inner twice as long as and the outer half as long as the peduncle, inside whitish pink, outside purple with small, brown to blackish spots. Inflorescence short-peduncled, developing before the leaf, c. 70-75 cm long, somewhat succulent; peduncle 4-10 cm long and 2 cm in diameter, brownish to purple with few small dark green to blackish spots, smooth. Spathe urceolate, 20-30 cm long, separated by a constriction in a wide, asymmetrical, ovoid tube and a spreading, triangular, limb; left side of the spathe overlapping with widely arched edge; tube 8.5-12 x 9-12 cm, in cross section asymmetrically oval to slightly depressed-circular, outside greyish green with a purple flush, with dark brown to dark green scattered spots and purple veins, inside basally purple, upwards changing to creamy or whitish green, the lower half densely covered with 2-4 mm long, dark purple hairlike emergences; limb spreading at an angle of c. 120° from the tube, 10-18 cm long, broad-triangular-acute, slightly recurved, outside brownish green and purple, inside glossy dark purple, margin undulate and purple. Spadix sessile. 60-70 cm long, more than twice as long as spathe; pistillate zone cylindrical, 3.5 x 2.5 cm, flowers congested; staminate zone obconical, 3.2 x 2.5-3.2 cm, flowers densely congested; appendix c. 56 cm long, 3.2 cm in diameter at the base, long-clavate. above the starninate zone slightly constricted, lower third with elongate, irregular, deep grooves, base creamy with irregular purple stripes. upwards becoming evenly pinkish, basally with antherlike staminodes higher up passing over into irregular warts and grooves; ratio of pistillate to staminate zone length 1:1; without a sterile zone between the pistillate and staminate zone. Pistillate flowers 4 mm long; ovaries ovoid-globose to cubic, (l-)2(-3)-locular, 2.5-3 x 2 mm, with one basal to slightly lateral, elongate, anatrop ovule; stigma subsessile, oval in both cross and lateral section, slightly 2(-3)-lobed, 1 x 2 mm, lobes cylindrical, tapering to a roundish tip, light green to creamy; style very short, 0.2-0.6 mm long, dark green. Staminate flowers 1.7-2 x 2 mm. creamy to light brown; anthers ovoid to elongate, free, or rarely pairwise unilaterally connate; filaments only 0.2-0.5 mm long but rather wide, sometimes connate to a roundish or irregular, flat columna; pores circular with reddish brown edges, one apical pore per theca; connective with two parallel short grooves, each with an apical brownish to purplish spot. Pollen globular, inaperturate. exine smooth (pistilate). INFRUCTESCENCE unknown.
    Diagnostic
    Amorphophallus canaliculatus belongs also to the large African section with hairlike emergences at the base of the spathe tube, but differs from all other African species with short peduncles in the strongly grooved appendix base. A. canaliculatus is most similar to A. zenkeri. Basal inner side of the spathe with hair-like emergences; Appendix grooved [furrowed] along its entire length, basally with wart-like staminodes.

    Distribution

    Amorphophallus canaliculatus Ittenb., Hett. & Lobin appears in other Kew resources:

    First published in Willdenowia 27: 150 (1997)

    Accepted by

    • Sosef, M.S.M. & al. (2006). Check-list des plantes vasculaires du Gabon Scripta Botanica Belgica 35: 1-438.
    • 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.

    Literature

    CATE Araceae
    • Ittenbach, S. & Lobin, W. 1997. Notes on the gunus Amorphophallus (Araceae), 6: Six new species and two new subspecies from Africa Willdenowia. 27: 147-160
    Kew Backbone Distributions
    • Sosef, M.S.M. & al. (2006). Check-list des plantes vasculaires du Gabon Scripta Botanica Belgica 35: 1-438.

    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

    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