1. Family: Araceae Juss.
    1. Genus: Amorphophallus Blume ex Decne.
      1. Amorphophallus impressus Ittenb.

        This species is accepted, and its native range is S. Tanzania to Malawi.

    [CATE]

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

    Diagnostic
    Amorphophallus impressus has been collected several times but not recognized as new (see Mayo 1985, under A. goetzei ). The species is most similar to A. lewallei and A. eichleri. Basal inner side of the spathe with wart-like to tongue-like emergences, tube strongly compressed, appendix ± smooth.
    Distribution
    S Tanzania and Malawi
    General Description
    Tuber unknown. LEAF solitary, c. 120 cm long; petiole c. 100 cm long, c. 2.5 cm in diameter at the base, green with purple spots; lamina green, c. 100 cm in diameter, rhachises with broad-triangular to oval wings, terminal leaflets elongate-oval, 4-10 7 1-3 cm, acuminate, margin slightly undulate or dentate. INFLORESCENCE: Cataphylls 2(-4), the outer one 10-14 cm long, the inner most 25-30 cm long, longer than spathe and peduncle together, whitish to pink and with greenish to brownish oval to roundish spots. Inflorescence sessile, appearing before the leaf, short-peduncled, c. 50-70 cm long; peduncle 5-10 cm long, 1-1.5 cm in diameter, smooth, brown-green with or without green or olive spots, to the spathe grading into purple. Spathe 12-25 cm long, separated by a strong constriction in a depressed, urceolate tube and a rimshaped to elongate-triangular limb; tube 3.5-10 7 4-9 cm, outside creamy to flesh-coloured, the lower part greyish brownish to green, with dark green veins and small green to brown spots; inside pinkish, purple to reddish brown, lower part with small, tongue-shaped colourless or purple or reddish brown emergences of 0.3-1 7 0.5 mm higher up reduced in size and causing the inside surface to be rough; limb strongly undulate, on the side of the longest cataphyll 4-6 cm long, on the other side elongate-triangular and 6-15 cm long, outside dark green to brownish purple, with thick purple veins, inside pink to purple, margin maroon. Spadix sessile or stipitate for 1-6 mm, 18-40 cm long, longer than spathe; pistillate zone cylindrical, 1-3 7 0.8-1.2 cm, flowers congested or somewhat distant; staminate zone obconical to ovoid, narrowed at base, 1.5-4 7 1-3 cm, flowers congested; sterile zone between pistillate and staminate zone 1-10 mm long; appendix 20-35 cm long, thick-conical to slightly clavate, above the staminate zone slightly constricted, 2-4 cm in diameter at the base, dark purple, verruculose; staminodes absent; ratio of pistillate to staminate zone length 0.4-0.6 : 1. Pistillate flowers 2-4 mm long; ovaries globose-ovoid, 1.5-2 7 1.5-2 mm, yellowish green or bright green, (1-)2(-3)-locular, stigma sessile, 1-2 7 1-2 mm, dark yellow, papillose, with 2(-3) small roundish humps or rarely roundish and smooth. Staminate flowers 0.9-1.6 7 1-1.9 mm, with 2-5 stamens; filaments absent or only 0.1-0.2 mm long; anthers free, elongate-ovoid to cubic, creamy to yellowish orange; connective with two small grooves, brown; pores elongate-oval, one apical to subapical pore per theca (rarely two pores per theca). Pollen inaperturate, exine smooth (psilate). INFRUCTESCENCE unknown.

    Images

    Distribution

    Native to:

    Malawi, Tanzania

    Amorphophallus impressus Ittenb. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Oct 8, 1995 Milne-Redhead, E. [9998], Tanzania K000950242 holotype
    Oct 8, 1995 Milne-Redhead, E. [9998], Tanzania K000950243

    First published in Willdenowia 27: 154 (1997)

    Accepted by

    • Haigh, A. & Boyce, P.C. (2012). Flora Zambesiaca 12(1): 1-54. Royal Botanic Gardens, Kew.
    • 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

    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