Bucephalandra gigantea Bogner

Herb c. 40 cm tall. Stem with short internodes c. 5 mm long, ?erect, 4 (-?) cm long (incomplete), c. 1 cm diam. Leaves to 10 together; petiole 15-28 cm long, sheathing at the extreme base, the wings extended into a very narrowly triangular ligular portion 5-12 cm long drying dark brown; blade elliptic, 18-25 cm long × 6-7 cm wide, abaxially punctulate, the base cuneate, the apex acuminate and apiculate for 5 mm; midrib abaxially prominent, slightly prominent adaxially, with 16-20 close-spaced primary lateral veins on each side, alternating with interprimaries and diverging at c. 45°; between the primary and interprimary veins finer secondary veins and between them a third order of striate venation finer still; ultimate venation (cross veinlets) obscure. Inflorescences small relative to leaves, in small synflorescences produced in series of 2-3 each consisting of 2 inflorescences subtended by lanceolate cataphylls to 6 cm long; peduncle 6-12 cm long, slender. Spathe ovate, 2.5-3.5 cm long, apiculate for 4-10 mm, the lower c. 1 cm persistent, the upper part falling (?caducous). Spadix 1.5-2 cm long; female zone 3-5 mm long, 1.8-3 mm diam.; ovary depressed-globular, 0.6-0.7 mm diam.; stigma sessile, disc-like, 0.3-0.4 mm diam.; interpistillar staminodes apparently absent (material poor); sterile interstice composed of 1-2 irregular whorls of more or less elliptic scale-like staminodes 1-1.5 mm long; male zone 4-5 mm long, 2-3 mm diam., cylindric; filaments of stamens more or less truncate, hidden from view by the prominent, rather elongate horned thecae 1.3-1.8 mm long; thecae together on the lower (with respect to spadix) side of the stamen, upward-facing (with respect to spadix); appendix subcylindric, 6-10 mm long, 2-3 mm diam., apically obtuse; staminodes of appendix irregular ellipsoid to roundish in surface view, truncate, 0.5-0.6 mm diam., apically papillose. Fruiting spathe funnel-shaped, 0.8-1 cm diam.; berries depressed globular, 1.5-2 mm diam., several-seeded; seed elongate, 1.1-1.5 mm long, c. 0.4 mm diam., with a curved micropylar appendage; testa slightly ribbed.