Amorphophallus symonianus Hett. & Sizemore

Tuber depressed globose, 2–10 × 1–6 cm high, producing several annual offsets, these globose, not separating from the main tuber the first season. Leaf solitary; petiole 10–105 × 1–2.5 cm, smooth, pale green with numerous short, narrowly linear, white stripes, the joint with the leaf blade swelling and transforming into a globose or elongate intercalary bulbil, often incorporating the swollen bases of the three main rachises; leaf blade 20–100 cm diam., rachises narrowly winged distally from the basal branchings, the nodes swelling and transforming entirely into globose or elliptic intercalary bulbils; leaflets elliptic to elongate-elliptic, 7–24 × 4–9 cm, acuminate, adaxially green, corrugate, venation strongly impressed, abaxially green, venation strongly raised. Inflorescence solitary, long pedunculate; peduncle largely or entirely hidden by the cataphylls, 10–20 × 5–10 cm, smooth, appearance as petiole; spathe elongate oval or orbicular, sometimes broader than long, slightly concave, apex overarching the spadix, 9–13 × 7–14 cm, base and limb not strongly differentiated, apex obtuse, margins of limb slightly recurved, exterior pale green or flushed with pale reddish brown and with some scattered, more or less distinct whitish dots, interior as exterior, slightly less green, base within smooth; spadix shorter than spathe, sessile, 7–12 cm long; pistillate flower zone slightly obconical, 1.2–2 cm × 8–15 mm at the base, 1.2–2 cm at the apex, flowers congested; ovaries depressed-globose, slightly angular or orbicular, 3 × 2.5–3 mm high, pale green, bilocular; style conical or terete, ca 1 × 0.8 mm at the base, pale green; stigma discoid, large, ca 2.5 × 0.5 mm, entire, with a shallow, slightly elongate central depression, surface glossy white, smooth; staminate flower zone elongate, slightly fusiform, terete or dorso-ventrally compressed, 3.3–4.7 × 1.7–3 cm, flowers congested; staminate flowers 3–5-androus; stamens 1.5 mm long; filaments 0.5 mm long, free; anthers 1 mm long, ca 1.5 mm, truncate, off-white; appendix short conical, slightly dorso-ventrally compressed, 2.7–5.5 × 1.6–3.5 cm, obtuse, smooth, ivory white. Fruit unknown.