1. Family: Araceae Juss.
    1. Genus: Amorphophallus Blume ex Decne.
      1. Amorphophallus curvistylis Hett.

        This species is accepted, and its native range is SW. Thailand.

    [CATE]

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

    Diagnostic

    Amorphophallus curvistilus mostly resembles  A. napalensis C:Wall.) Bogner & Mayo in several characters but differs among other characters in the smaller and smooth appendix and the shorter peduncle. It also resembles  A. krausei Engl. But lacks the staminodial zone between male and female parts of the spadix and it has a different stigma and a shorter peduncle.

    Distribution

    Thailand (eastern), Kanchanaburi Prov.

    South Western Thailand: : Kanchanaburi. Endemic.

    General Description

    Tuber subglobose or slightly depressed, up to 12 cm in diam., dark brown, smooth, developing long rhizomatous offsets.  Leaf solitary; petiole very turgid, smooth, 50- 120 cm long, c. 3 cm in diam. at the base, entirely green or spotted white-tan and brown; blade highly dissected, up to 130 cm in diam.; basal parts of the rhachises naked, distal parts narrowly winged; leaflets elongate elliptic, acuminate, base decurrent on the rhachis, upper surface mid-green, 22-30 cm long, 7.5-8.5 cm in diam., venation strongly impressed on the upper surface.  Inflorescence moderately long peduncled;  peduncle 20-40 cm long, c. 1.5 cm in diam., colour as petiole;  spathe erect, cymbiform, elongate triangular, slightly constricted at the middle, acute, 10-30 cm long, 8-17 cm in diam., subcoriaceous, base convolute, outside dull green with a few paler spots and with a faint brownish hue or spotted white-tan and brown, inside side pale green, limb outside and inside as base, base within with numerous small shallow longitudinally elongate warts.  Spadix shortly stipitate, subequalling the spathe, 9-28 cm long;  female zone cylindric, 1-5 cm long, 0.8-2.5 cm in diam., flowers congested;  male zone cylindric or slightly conic, 4-12.5 cm long, 0.9-2.1 cm in diam., flowers congested, the lower ones distant, upwards irregularly connate or in ascending spirals;  appendix elongate, fusiform--conic, 4-10.5 cm long, 1.5-2.5 cm in diam., top rounded, base with a few grooves or with a few rounded staminodes, ivory-white, surface at first smooth but rugulose at male anthesis, developing considerable heat at female anthesis and a heavy gaseous stench.  Ovaries depressed, angulate, green or greenish white, 4-5 mm in diam., 2 mm high, unilocular;  style placed eccentrically on the acroscopic part of the ovary, laterally compressed, strongly curved upwards and to the spadix-axis, suddenly enlarged near the top, 3-4 mm long, white or green with a pale brownish hue, turning entirely brown at male anthesis;  stigma large, pointing towards the spadix-axis, more or less strongly transversely folded, bilabiate, auricled, with two central depressions, the acroscopic margin emarginate, surface verruculate, dirty yellow or orange, turning entirely brown at male anthesis, 3 x 2 mm in diam.  Male flowers consisting of (2-)3-7 stamens;  stamens ivory-white, 1.5-3 mm long, c. 2 mm in diam, in the lowermost flowers c. 3 mm in diam., these sometimes sterile through reduction of the anther;  filaments 1-2.5 mm long, basal half connate, length varying considerably within one flower;  anthers c. 0.5 mm long, truncate or subglobose, pores apical, elongate, narrow.  Pollen striate.

    Tuber subglobose or slightly depressed, 2–9 × 3–12 cm, smooth, developing offsets, these rhizomatous, 7–30 × ca 1 cm, slightly laterally compressed, apex swollen. Leaf solitary; cataphylls 4, lanceolate, apex emarginate, apiculate, 3–30 cm long, outer three cataphylls nearly entirely ivory-white, the innermost one ivory-white with a pale brownish hue and some small, blackish spots, soon withering and turning dark brown; petiole very turgid, smooth, 50–120 × 3 cm, entirely green or spotted white–tan and brown; leaf blade highly dissected, up to 130 cm, basal parts of rachises naked, distal parts narrowly winged; leaflets elliptic, 22–30 × 7.5–8.5 cm, acuminate (acumen 1–3 cm long), base decurrent on the rachis, adaxially mid-green, venation strongly impressed adaxially. Inflorescence solitary; peduncle 20–40 × ca 1.5 cm, appearance as petiole; spathe erect, cymbiform, elongate triangular, slightly constricted at the middle, acute, 10–30 × 8–17 cm, subcoriaceous, base convolute, exterior dull green with a few paler spots and with a faint, brownish hue or spotted white–tan and brown, interior pale green, limb exterior and interior as base, base within bearing numerous, small, shallow, longitudinally elongate warts; spadix shortly stipitate, subequalling the spathe, 9–28 cm long; stipe ca 8 mm long; pistillate flower zone cylindrical, 1–5.0 cm × 8–25 mm, flowers congested; ovaries depressed, angular, green or greenish white, 2 mm high, 4–5 mm in diam. ; style placed eccentrically on the acroscopic part of the ovary, laterally compressed, strongly curved upwards and to the spadix-axis, suddenly enlarged near the apex, 3–4 mm long, white or green with a pale brownish hue, turning entirely brown at staminate anthesis; stigma large, pointing to the spadix-axis, more or less strongly, transversely folded, bilabiate, auricled, with two central depressions, the acroscopic margin emarginate, surface verruculate, sticky, dirty yellow or orange, turning entirely brown at staminate anthesis, 3 × 2 mm; staminate flower zone cylindrical or slightly conical, 4–12.5 cm × 9–21 mm, flowers congested, the lower ones distant, upwards irregularly connate or in ascending spirals; staminate flower (2–)3–7-androus; stamens ivory-white, 1.5–3.0 × ca 2 mm; appendix elongate, fusiform-conical, apex rounded, base with a few grooves or with a few rounded staminodes intermediate between stamens and the appendix–wall, ca 4–10.5 × 1.5–2.5 cm, ivory-white, surface at first smooth, becoming rugulose at staminate anthesis. Fruit unknown.

    Habitat

    Shaded limestone slopes in mixed bamboo deciduous forest.

    Shaded limestone slopes in mixed bamboo deciduous forest.

    Distribution

    Native to:

    Thailand

    Amorphophallus curvistylis Hett. appears in other Kew resources:

    First published in Blumea 39: 251 (1994)

    Accepted by

    • Boyce, P.C., Sookchaloem, D., Hetterscheid, W.L.A., Gusman, G., Jacobsen, N., Idei, T. & Nguyen, V.D. (2012). Flora of Thailand 11(2): 101-325. The Forest Herbarium, National Park, Wildlife and Plant Conservation Department, Bangkok.
    • 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.

    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