Amorphophallus hildebrandtii (Engl.) Engl. & Gehrm.

Seasonally dormant herb. Tuber depressed globose, at least to 25 cm in diam. Leaves solitary, to 2 m tall, 1–2 m across; petiole to 150 cm long, to 8 cm in diameter at the base, smooth, very variable, spotted, green with minute speckling or white-pinkish or dirty pale to dark greyish to ivory white background with oval to elliptic dark olive green spots with or without darker borders, spots often confluent; lamina decompound, rachises narrowly winged in the distal parts; leaflets elliptic-lanceolate to lanceolate, 2 - ca. 15 cm long, 0.9 - ca. 5 cm wide, acuminate, upper surface mid or pale green, somewhat glaucous, lower surface pale green. Peduncle to ca. 100 cm long, as petiole but usually paler. Spathe ovate, to 90 cm long, to ca. 70 cm in diam., base narrowly tubular, convolute, limb broadly tubular for the larger part of its length, erect, top slightly hooded, at first narrowly opening, later expanding more widely, base outside whitish, inside reddish purple with scattered, orbicular blackish spots, surface with a glaucous waxy layer, limb outside dirty brownish purple or pinkish purple with pale greenish main veins, slightly glossy, inside basal part uniformly blackish purple with a glaucous waxy layer, upwards reddish purple, with blackish veins and orbicular spots, the latter numerous and often confluent along the central part of the limb. Spadix sessile, distinctly shorter than spathe, 20 - ca. 40 cm long; female zone cylindric, 3.5 - 5 cm long, to 4 cm in diam., pistils not congested; male zone broadly cylindric-fusiform or obconical, 2–4 cm long, 3–4 cm in diam., stamens congested; appendix broadly to narrowly elongate conical, 10 - ca. 30 cm long, 4–6 cm in diam. at the base, top acute, surface very shallowly furrowed, blackish purple to dirty greenish. Ovary slightly elongate-ovate, 2.5 - 3 mm long, 2 mm in diam., unilocular, base pale greenish whitish, rest blackish purple; style distinct, slightly conical 1–1.5 mm long, 0.8 - 1 mm in diam., blackish purple; stigma depressed, obliquely inserted on the style, with one distinct, conical, obtuse or acute lobe, 1.3 mm in diam., 0.5 - 1 mm high, surface densely scabrate, off-white or dark greyish purple. Male flowers consisting of 4–5 stamens; stamens 3 mm long; filaments 1 mm long, only fused at the base; anthers 2 mm long, 1.5 - 2 mm in diam., truncate, orangish, connective often brownish, pores apical, slit-like.