Amorphophallus harmandii Engl. & Gehrm.

Tuber narrowly elongate, occasionally branching, ca 40 × 2 cm diam., rhizomorphic, with distinct ring-like scars of scales at the base. Leaf solitary; petiole 20–80 cm × 4–10 mm, smooth, uniformly pale green or, at the base, with a purplish flush, or grey with blackish dots, grading to pale green with blackish dots upwards; leaf blade 36–74 cm diam., rachises winged throughout; leaflets variable, elliptic, elliptic-lanceolate or lanceolate, 2–20 × 1–7.5 cm, adaxially green to dark green, sometimes with a narrow reddish purple margin, sometimes splashed with small, orbicular white spots, abaxially pale green; peduncle 6–18 cm × 3–4 mm, smooth, dirty pale greyish brown with small, elongate-elliptic, blackish green and white spots; spathe ovate to orbicular, 5–13 × 5–10.5 cm, erect, concave, margin straight, apex acute, outside pale green, inside whitish green, base usually darker green or yellowish green, base within densely verrucate, verrucae small, conical; spadix longer than spathe, sessile, 8–25 cm long; pistillate flower zone short cylindrical or slightly obconical, 6–10 × 10–15 mm, flowers congested or slightly distant; ovaries depressed, lobed-grooved, 2–2.5 × 1.5–2 mm, bright pale green; style slightly conical, 2–3 × ca 1 mm, strongly pointing to the top of the spadix, whitish green, sometimes grooved; stigma obliquely inserted, often orientated towards the spathe inner surface, depressed, ca 0.6 × ca 1.5 mm , shallowly bilobed through a transversely elongate shallow depression, the latter often Λ-shaped, surface verruculate, dirty pale yellowish brown; staminate flower zone elongate, fusiform-conical or lageniform with a distinctly dilated basal half, 3–6 × 1–1.7 cm, the swollen base sometimes separating the staminate flowers; staminate flowers 3 – 4(–5)-androus, stamens 1.5–2 mm long; filaments very short, fused, 0.2–0.5 mm long, white; appendix very narrowly conical, near myosuroid, or fusiform conical, 5–18 cm × 5–16 mm, when thin, slightly sigmoidally curved forward in the lower half, surface smooth or with elongate, shallow grooves, creamy white or greenish yellow, top acute, base smooth or partly furrowed. Fruit not known.