Amorphophallus serrulatus Hett. & A.Galloway

Tuber subglobose to slightly elongate, 1.5-2 cm long, 1-2 cm in diam., not branching. Petiole thin, 12-18 cm long, 0.3-0.5 cm in diam., smooth, uniformly pale green; lamina subpedate, consisting of only 4-6 leaflets, ca. 15 cm wide, central main segment undivided, lateral segments with 2-3 leaflets; leaflets elliptic to obovate, 6-8 cm long, 3.5-4.8 cm wide, apex acute with a small mucronate tip, margins minutely crenate-serrulate, upper surface uniformly green or with a few small, orbicular, white spots. Peduncle 1 cm long, 3 mm in diam., entirely subterranean, smooth, white; spathe erect, convolute part slightly tapering to the apex, elliptic to elongate-elliptic, 2.5-3 cm long, ca. 2 cm in diam., outside pale pinkish or greyish with purplish veins, inside base dark purple, limb densely spotted whitish pink and dark purple or almost entirely dark purple, apex acute, upper limb margin often curved inwards and slightly rugulose on the outer surface, base inside smooth, long convolute, basal part usually subterranean; spadix longer than spathe, sessile; female zone consisting of one whorl of flowers, 1 mm long, 3 mm in diam., flowers congested; male zone cylindric, 2.5-3 mm long, 3 mm in diam., flowers congested or distant; appendix stipitate (stipe 0.5-1 mm long, 0.lmm in diam., fusiform, 1.8-2.5 cm long, 2 mm in diam. (at the middle), acutish, surface lower part smooth, whitish or spotted purple and white, upper part rugulose, greyish, dirty creamish or spotted purple and white. Ovary subglobose, more or less 2-lobed, laterally flattened, 1-1.5 mm in diam., 1 mm high, white, spotted purple, bilocular; style oblique, elongate conical, 1 mm long, 0.5 mm in diam., at the base, 0.2 mm in diam. at the irregularly lobed apex, dirty greyish-whitish; stigma 0.1-0.2 mm in diam., very thin, lateral, more or less cup-shaped, sunk into the apical tissue of the style, circular or oval with a central depression. Male flowers consisting of 1-3 stamens; stamens 1-1.3 mm long; filaments ca. 0.3 mm long, connate; anthers 0.7-1 mm long, ca. 1 mm in diam., creamish. Pollen striate.