STEM: decumbent, to l m tall, up to about 4.5 cm in diam., internodes 0.5-9 mm long; prophyll scars 4-8 mm long; intravaginal squamules lacking; foliage leaf scars obliquely and transversely elliptic, 2 cm long, 3 cm wide. LEAF: prophyll c. 23 cm long; petiole 36-46 cm long, 0.6-0.7 cm diam. at apex, sheath 9-11 cm long; leaf blade elongate-sagittate, coriaceous, yellow-green, margins entire, sometimes repand, overall length 39-46 cm long, overall width 16-21 cm; anterior division 30-35 cm long, 16-21 cm wide, apex acute to subacute, primary lateral veins 5-7 per side, arising at an angle of 40-75° to midrib, paler than blade on upper surface; posterior divisions 8-10 cm long, 0.2 x overall blade length, 9-10 cm wide, basal ribs denuded for 2.5-3.5 cm, tip obtuse to rounded, primary acroscopic veins 1-2, primary basiscopic veins lacking. INFLORESCENCE: peduncle (8.5-)15.5-21 cm long, 1-2 cm diam. at apex; spathe (11-)12.5-16.5 cm long, (1.3 —)1.5 — 3 cm diam., decurrent for 2-3.5 cm, outer surface green to pale green; spadix 10-12-5 cm long, fertile male zone 2.8-3.5 cm long, 1.3-1.4 cm diam., ellipsoid, thicker than upper part of sterile zone, sterile male zone 5-5 5 cm long, 1.2 - 1.4(-1.8) cm diam., subcylindric, thicker at base, female zone 2.5-3 cm long, 1.1-1.5 cm diam. FLOWERS: stamens 4 mm long, 1.1-1.4 mm diam. at apex; staminodes 3.3-3.8 mm long, 1.9-2.5 mm diam. at apex, shortly and squatly clavate, tapering strongly to base, prismatic, apex ± truncate; gynoecium 6-6.5 mm long, ± flask-shaped, ovary 2-3 mm long, 2.5-3 mm diam., ± ventricose, broader than style, locules 4-6, ovules 2-3 per locule, inserted in cluster towards locule base, style longer than ovary, c. 4 mm long, compitum very long, penetrating ovary axis usually as far as the upper third but sometimes to halfway down, ridged along its length, raphide cells concentrated around lower half, style crown distinctly lobed, tannin cells only sparsely present in style lobes, central dome lacking, stylar canals short, entering locules about halfway down, stigma 3.5-4 mm diam., covering style lobes, ± lacking tannin hairs. INFRUCTESCENCE: not seen.