Araceae Juss.

Amorphophallus muelleri Blume

This species is accepted, and its native range is Assam to W. Malesia.


CATE Araceae, 17 Dec 2011.


Andaman Islands (type of A. oncophyllus and A. carnosus) eastward through Myanmar (type of A. myanmanicus) into N. Thailand, south–eastwards to Sumatra (type of A. planus), Java (type), Flores, and Timor (type of A. timorensis).

General Description

Tuber globose or depressed-globose, to 28 cm diam., with annual offsets, root-scars annular, swollen. Leaf solitary, occasionally two on one tuber; petiole smooth, 40–180 × 1–8 cm, green, olive-green, brownish green or almost black, with numerous, large, elongate-elliptic, diamond shaped or stripe-like, pale green spots and, sometimes, with an additional high number of small, pale green, rounded dots; leaf blade highly dissected, 75–200 cm diam., with epiphyllar bulbils in the centre on the major branchings and on most distal branches, rachises winged distally from the main lower main branchings; main segments several times subdichotomous; leaflets lanceolate or elliptic lanceolate, 10–40 × 4–15 cm, acuminate, base strongly and broadly decurrent, adaxially green or dark green with a narrow, whitish or pinkish red margin, especially when young; bulbils depressed, rounded or elongate, 0.5–6 cm diam., 1–40 per leaf, greyish brown. Inflorescence solitary, long-pedunculate; peduncle appearance as petiole, 30–60 × 0.5–3 cm; spathe broader than long, rarely slightly the reverse, very broadly triangular or transversely elliptic, coriaceous, marcescent, 7.5–32 × 6–36 cm, base strongly convolute and slightly or clearly constricted at the apex, limb semi-erect or spreading, often partly horizontal, margin reflexed, ± suddenly narrowed to the apex, the latter very obtuse, base within nearly smooth or with numerous small, elongate warts, these often confluent, exterior base pale green or pale dirty pinkish with, usually, transversely elongate, whitish spots and few small, blackish green dots, grading to brownish purple, pink or dark greyish green upwards, with large, ± isodiametric white spots, interior base dark pink, bright pale pink or pale yellowish pink, grading to purplish, pink, dark pink, dark brownish pink or brownish upwards with dirty pale greenish and dirty pale brown, transversely oval spots, or the latter white; spadix sessile or stipitate or intermediate, longer than spathe, 8–40 cm long, drying in fruit and remaining; stipitate, stipe 10–15 mm long; pistillate flower zone cylindrical or slightly fusiform, 1.5–10 × 1–5 cm, flowers congested, lax or intermediate, the lowermost flowers more loosely arranged than the upper ones; ovaries shortly stipitate, depressed, 3–3.5 × 1–1.5 mm high, lower half reddish purple, upper half pale pink, 2–3-locular, one basal ovule per locule, stipe ca 0.5 mm long; style short and thick, largely pale pink but uppermost zone reddish purple, 0.3–1 × 0.8–1 mm; stigma large but diameter always slightly smaller than ovary, circular, quadrangular or slightly oval in cross-section, flattened, subhemispherical or hemispherical, with a shallow, elongate or three–rayed central depression or shallowly 3–4-lobate, margins reflexed, occasionally with two or three equidistant, small notches, dirty pale yellow, 1–2 × 0.8–1.5 mm high, surface copiously covered with a very viscous fluid; staminate flower zone cylindrical, obconical or fusiform, 2–9 × 0.9–6 cm, in large specimens usually laterally compressed, flowers congested; staminate flowers 3–5-androus; irregularly prismatic or rectangular in cross-section, dirty pale yellow; appendix fusiform-conical, 3–22 × 1.5–9 cm, apex subacute or acute, laterally compressed to various degrees, surface with numerous small, punctiform depressions and with or without some irregular, larger shallow depressions, base with staminodes intermediate between stamens and the appendix–wall, pale pinkish, yellowish or pale brownish. Infructescence cylindrical, consisting of up to 1000 berries; fruit elongate or elongate-ovate, 1.2–1.8 cm long, apex slightly depressed, ripening bright red.


Ruderal and open secondary seasonal forests.


None recorded.

Native to:

Andaman Is., Assam, Borneo, Jawa, Lesser Sunda Is., Myanmar, Sumatera, Thailand

Amorphophallus muelleri Blume appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Feb 19, 1992 Prain, D. [s.n.], Coco Is. K000291428 isotype
Feb 19, 1992 Kurz, S. [2662], Myanmar K000291501 isotype
Feb 19, 1992 Kurz, S. [2662], Myanmar K000291502 holotype
Sato, T., Indonesia 29047.439
Sato, T., Indonesia 29047.462
Mayo, S. [T85/4], Thailand 29047.532
Mayo, S. [T85/3], Thailand 29047.533
Thailand 29047.622
Thailand 29047.788
Thailand 29047.790
Thailand 29047.792
Thailand 29047.793
Thailand 29047.796
Thailand 29047.797
Mayo, S. [629], Indonesia 46982.000
Indonesia 46983.000
Mayo, S. [633], Malaysia 48381.000
Mayo, S. [T85/2], Thailand 48382.000
Mayo, S. [T85/9], Thailand 48383.000
Mayo, S. [T85/5], Thailand 48384.000
Mayo, S. [T85/10], Thailand 48385.000
Mayo, S. [T85/1], Thailand 48386.000
Mayo, S. [T85/11], Thailand 48449.000
Thailand 49721.000
Wichian [200], Thailand K000291503 isotype
Wichian [200], Thailand K000291504 isotype

First published in Rumphia 1: 143 (1837)

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.
  • Sasikala, K., Vajravelu, E. & Daniel, P. (2019). Fascicles of Flora of India 29: 1-357. Botanical Survey of India, New Delhi.
  • Yuzammi (2009). The genus Amorphophallus Blume ex Decaisne (Araceae - Thomsonieae) in Java Reinwardtia 13: 1-12.


Kew Backbone Distributions

  • Sasikala, K., Vajravelu, E. & Daniel, P. (2019). Fascicles of Flora of India 29: 1-357. Botanical Survey of India, New Delhi.

  • 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

    Digital Image © Board of Trustees, RBG Kew

  • Kew Backbone Distributions

    The International Plant Names Index and World Checklist of Selected Plant Families 2022. 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 2022. Published on the Internet at and
    © Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families.