Amorphophallus muelleri Blume

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.