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Amorphophallus fuscus Hett.
Tuber depressed globose, 4-10 x 4-7 cm, dark brown, offsets rhizomatous, to 15 x 1.5 cm, scaly. Petiole 34-70 x 1-2 cm. smooth, mauve with dark brown to dark reddish brown, scattered, elongate oval or oval spots; lamina 52-80 cm in diam. rachises winged above the basal branchings; leaflets elliptic to elliptic-lanceolate, 5-20 x 2-5 cm., broadly acuminate, with short apiculum, upper side green, venation visibly highly reticulate. Inflorescence long-peduncled; peduncle 16 cm long, 7 mm in diam., smooth, brown w ith scattered, elliptical very dark brown spots; spathe erect, base and limb not separated, shallowly convolute in the lower part, ovate, 10 cm long, 7 cm wide, acute, outside glossy brown, the lower part with very few, scattered, small, orbicular dark brown spots, upper part darker brown towards the margin, inside pale dirty yellow-green, the base dark maroon, with several very shallow warts. Spadix sessile, as long as the spathe, 10 cm long; female zone cylindric, 12 mm long, 12 mm in diam., flowers congested; male zone subcylindric, slightly narrowing to the apex, 3 cm long, 12 mm in diam., flowers congested; appendix cylindric-conical, base attenuate, apex rounded, 5.8 cm long, 1.5 cm in diam. above the base, smooth, lower part with shallow, more or less diamond-shaped staminodes, diminishing upwards, surface off-white, developing a strong oligomethyl-oligosulphide smell. Ovaries 4-5-angulate, apex hemispheric, 2-2.5 mm high, 2 mm in cliam., base white, otherwise dirty purple, unilocular; style elongate conical, held almost parallel to the spadix, 1.5- 2 mm long, 1 mm in diam. at the base, 0.8 mm diam. at the middle, apex slightly expanded and shallowly lobed, pale green, base dirty purplish; stigma velY thin, 0.3 mm high, 1 mm in diam., draped over the lobes of the style apex, radially 3-4-lobed-sinuate, shallowly verrucate, dirty pale greyish. Male flowers consisting of 3-5 stamens; stamens 2.5 mm long; filaments thick, fused entirely, 2 mm long, 2 mm in diam., those of the lower flowers much broader, up to 5 mm in diam., off-white; anthers truncate, 0.5 mm long, 1 mm in diam., off-white suffused with pale dirty purple; connective broad, off-white; pores slit-like, marginal. Pollen striate.