Alocasia navicularis (K.Koch & C.D.Bouché) K.Koch & C.D.Bouché

Massive, pachycaul, evergreen herb to 1.5 m with milky latex. Stem erect to decumbent. Leaves several together, clustered at the tips of stems of larger plants; petiole to 1.5 m long; petiolar sheath margins membranous; leaf blade peltate, cordate-ovate, 130 × 120 cm, apex short acuminate; primary lateral veins 9–12 on each side. Inflorescences 2–3 together among the leaf bases; peduncle 40–45 cm, stout, much exceeding the cataphylls at anthesis; spathe 10–20 cm long, constricted about 1/6 of the way from the base; lower part green, ovoid; spathe limb broadly oblong-lanceolate, 18–15 × 4–8 cm, hooded at anthesis, dark yellow; spadix shorter than the spathe, shortly stipitate; pistillate flower zone 1–2 × ca 1.5 cm; ovaries mid-green, ca 3 mm diam.; stigma sessile, 3–4-lobed, the lobes blunt, pale green; sterile interstice equalling the staminate zone, ivory, narrowed corresponding to the spathe constriction; synandrodia rhombo-hexagonal, ca 2.5 mm diam., whitish, stained purple; staminate flower zone cylindrical, 3–4 × 1.5 cm, white; synandria rhombo-hexagonal, convex-topped owing to cap-forming synconnective, ca 1.5 mm diam.; appendix elongate-conical, 3–4 × 1–2 cm, equalling length of the spadix, about the same thickness as the staminate flower zone at the base, white. Fruiting spathe ellipsoid, ca 5–11 cm long, medium-green, glossy; fruits ellipsoid, ca 10 × 6 mm, ripening dark red.