Amorphophallus lunatus Hett. & Sizemore

Tuber short or long elongate, rarely branching, to 20 × 5 cm. Leaf solitary; petiole terete, 25–70 cm × 7–19 mm, uniformly pale reddish brown or with narrow, whitish pinkish longitudinal stripes or linear spots; leaf blade 17–60 cm wide, main segments with few, relatively large leaflets, winged to the base; leaflets elliptic-oblong, 6–18 × 2.8–8.5 cm, acute-acuminate, adaxially rich dark green, margin narrowly lined purplish red, abaxially pale green, margin as adaxially. Inflorescence solitary; peduncle 20–40 cm × 5–10 mm, appearance as petiole; spathe ovate to broadly ovate, slightly concave, erect, 6–11.5 × 4–13 cm, greenish white all over, margins involute, apex acute, slightly hooded, base within densely clothed with short, fleshy, complexly branched verrucae; spadix sessile, longer than spathe, 11.5–30 cm long; pistillate flower zone cylindrical, 5–11 × 7–11 mm, flowers more or less congested; ovaries strongly depressed, 1 × 2.5–3 mm, pale green, bilocular; style 0.4 × 1.5 mm, white; stigma disciform, 0.3 × 2 mm, subentire to shallowly 4–5-lobed, grooves between lobes radiating from the centre, central depression slightly elongate, margin sometimes slightly notched and lobed–sinuous, surface minutely rugulose, white; sterile interstice present or absent, staminodes congested; staminodes as staminate flowers but slightly shorter and without thecae; staminate flower zone cylindrical to cylindrical-conical, base slightly constricted, 3–5 cm × 6–13 mm at the base, 5–12 mm at the apex, flowers congested; staminate flowers 2–5-androus; stamens polygonal in cross-section, whitish; appendix 8–24 cm × 7–20 mm, narrowly elongate conical, tapering from base to apex, laterally flattened, base slightly attenuate, apex narrowly obtuse or acute, surface irregularly rugulose, pale yellowish green. Infructescence cylindrical, 3–6 × 3 cm; fruits ovoid-lageniform, the swollen basal region of the style prominent, 10–15 × 6–10 mm, smooth, ripening white.