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Araceae
Amorphophallus sinuatus Hett. & V.D.Nguyen
SUMMARY
Tuber elongate, to 20 cm long, 2-3 cm in diam. at the top, tapering to the base, not branching. Petiole 17 cm long, 4 mm in diam., uniformly pale green; lamina 45 cm in diam., rachises unwinged; leaflets elongate elliptic, 19 cm long, 7 cm in diam., acuminate, upper surface dull green, lower surface glossy green. Peduncle smooth, pale green all over, 10 cm long, 0.5 cm in diam., almost entirely hidden by longest cataphyll. Spathe broadly triangular, 3 cm long, 3.5 cm in diam., limb and base not differentiated, top obtuse, outside uniformly pale green, veins slightly darker, inside as outside, slightly paler, base slightly darker, base within with scattered, shallow, whitish-greenish, punctiform warts. Spadix sessile, distinctly longer than spathe, male part reaching well beyond the spathe, 11 cm long; female zone cylindric, 1 cm long, 0.8 cm in diam., flowers congested or slightly distant; male zone cylindric, 4 cm long, 0.7 cm in diam., flowers congested, the lower ones slightly distant, sometimes adjacent flowers in the same spiral fused, in the upper regions of the zone individual flowers hardly recognizable, only as individual stamens; appendix elongate cylindric-conical, 6 cm long, 0.8 cm in diam at the base, 0.4 mm in diam. near the top, tapering, slightly dorsiventrally compressed, smooth, very pale green, top more or less obtuse, emitting a powerful stench of oligolmethyl-oligosulphides. Ovaries obconical, top strongly truncated, the base sunken in the spadix-axis, 2 mm in diam., 1 mm high, bright pale green, unilocular; style thick, short, 0.2-0.4 mm long, 0.8 mm in diam., pale green; stigma large, depressed, shallowly three-lobed, 1.5 mm in diam, 0.8 mm high, lobes broadly obtuse, surface scabrate, white. Male flowers consisting of 3-6 stamens (excl. laterally fused flowers); stamens 1 mm high, 0.8-1.2 mm in diam., rectangular or irregularly angulate in upper view, truncated; filaments 0.5 mm long, fused, off-white; anthers 0.5 mm long, off-white, pores of the thecae opening to one central pore at anthesis, rupturing the connective, connective produced, short conical.