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  1. Family: Araceae Juss.
    1. Genus: Amorphophallus Blume ex Decne.
      1. Amorphophallus corrugatus N.E.Br.

        This species is accepted, and its native range is China (SE. Yunnan, Guangxi) to N. Indo-China.


    CATE Araceae, 17 Dec 2011.

    General Description
    Tuber dark brown, globose, ca. 7cm high, to 8cm in diam., weighing up to 850g, developing seasonal offsets; offsets long, rhizomatous, ca. 9cm, slender, ca. 0.8cm in diam., not apically thickened. Leaf solitary; petiole background color dirty white or pale green with a very faint, pale brownish hue overlain with numerous tiny and fewer large, partly confluent, irregular, dark chocolate-brown or grayish spots, 10–95cm, slender, to 2 cm in diam. at base, longitudinally, shallowly ridged; leaf blade green adaxially, moderately dissected, 10–150cm in diam.; rachises only winged in distal 1/3; main segments subdichotomous; terminal segments oblong or lanceolate, base long decurrent in most distal ones, other segments narrowly sessile, 10–28 × 4–9cm, apex acuminate. Inflorescence long pedunculate; cataphylls to 40cm; peduncle colored as petiole, 30–70cm, 0.8–2cm in diam. at base. Spathe shortly convolute at base, outside pale greenish, grayish purple, or white, sometimes to base with whitish spots, or with gray-green or pale olive-brown spots, either only margin purplish red or also large parts reddish brown, inside pale greenish white with several irregular, purplish red spots and a purplish red margin, base inside often purplish red, or utmost base whitish, ovate or elliptic-ovate, concave, 7–26 × 4–16cm, apex acute or obtuse, glabrous. Spadix white or with some pale brownish spots and a pinkish hue, much shorter than spathe, stipitate, 4–11cm; stipe 0.2–1.5cm, slender; flowers unisexual; female zone cylindric or slightly obconic, 1.3–3.5cm, 0.8–2cm in diam. (including styles), flowers congested; ovary dark purple with pale whitish green base, globose, depressed, or subpyriform, orbicular, diamond shaped, or irregularly angulate in cross section, 1–2mm high, 1.5–2(–3) mm in diam., ± gradually tapering to style but after fertilization developing an annular articulation, 1-loculed, occasionally 2-loculed, with 1 basal ovule per locule; style straight or ± strongly curved toward spadix axis, entirely dark purple or apical half bright pale green, slender, cylindric or slightly conic, apex oblique and sometimes tricuspidate or drawn out in a slender point reaching beyond stigma, 2–4mm, ca. 0.8mm in diam. at base; stigma subapical or lateral, superficial or subcapitate, usually transversely bilabiate, rarely longitudinally oval, shallowly but densely verrucate or echinate, occasionally with elongate, fleshy, conic verrucae, pale yellowish or dirty whitish, 0.5–1mm in diam., 0.2–0.5mm high; male zone cylindric to fusiform-obconic, 1.3–4 × 0.7–2.2cm, flowers densely congested; male flowers consisting of 3–5 stamens; stamens 3–3.5mm; filaments 1.8–2mm, proximal half connate, whitish; anthers whitish, pinkish, or flesh-colored, elongate, subquadrangular or strongly biconcave in cross section, 1.3–1.5 × 1–1.3mm, apex truncate; connective pale violet, massive; pores transversely elongate, lateral; appendix hardly to distinctly stipitate, globose, ovoid, elliptic, or conic, obtuse or truncate, at first turgid but during female anthesis weakening quickly and soon shriveling and drying, turning brown, 1–5 × 1–3cm, with several irregular grooves (not associated with staminodes), longitudinal ones deepest, between usually with a complex and dense pattern of elongate, convolute staminodes, separated by narrow grooves, whole appearing brainlike, yellowish white or pale grayish green, occasionally with a pale violet hue; stipe of appendix cylindric or obconic, 0.1–0.6 × 0.3–1cm. Infructescence cylindric, ca. 4 × 2 cm. Berries at first green, maturing orange, elliptic, 1- or 2-seeded.
    Fl. Mar–May, fr. Apr–Jun.
    Shaded places in primary evergreen forests, on granite bedrock.
    tan yang mo yu



    Native to:

    China South-Central, China Southeast, Myanmar, Thailand


    Other Data

    Amorphophallus corrugatus N.E.Br. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Jan 1, 1994 Kerr, A.F.G. [s.n.], Thailand K000291455
    Jan 25, 1992 Kerr, A.F.G. [1105], Thailand K000291454 holotype
    Thailand 29047.446
    Bogner, J. [375], Thailand 34424.000


    First published in Bull. Misc. Inform. Kew 1912: 269 (1912)

    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.
    • Wu, Z. & Raven, P.H. (eds.) (2010). Flora of China 23: 1-515. Missouri Botanical Garden Press, St. Louis.
    • 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.


    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.

    Herbarium Catalogue Specimens
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    Kew Backbone Distributions
    The International Plant Names Index and World Checklist of Selected Plant Families 2020. Published on the Internet at and
    © Copyright 2017 World Checklist of Selected Plant Families.

    Kew Names and Taxonomic Backbone
    The International Plant Names Index and World Checklist of Selected Plant Families 2020. Published on the Internet at and
    © Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families.