A robust, glabrous, perennial herb up to 90cm tall, with rhizome up to 11mm indiameter. Leaves 3-ranked, in a rosette, simple, linear, linear-oblong to oblong, (16-)20-98cm x 2-6.5cm, narrowed into a pseudopetiole up to 39cm long at base,cuspidate at apex, margins entire to scabrid near apex, leathery, 3-veined, youngleaves pinkish to reddish on lower side; sheath present at base of pseudopetiole.Inflorescence a terminal, ellipsoid to hemi-spherical spike up to 3cm long, on a lateralscape up to 29cm long; spike with several involucral bracts. Flowers unisexual, sessile,arranged in axils of bracts along an axis (?spicoid??), lower 3 flowers of spicoid male,with 1 stamen, terminal flower female, with elongate style ending in 3 stigmabranches; each spicoid with 6 bracts (so 2 without flowers). Fruit nutlike, ellipsoid toobovoid-ellipsoid, dull pale green to medium-brown, with succulent exocarp andstony endocarp. Mapania comprises about 75 species and is pantropical. In theMalesian region about 30 species occur, Borneo being richest (25 species), followedby Peninsular Malaysia (16). Mapania cuspidata is a variable species. Three varietiesare distinguished, differing in leaf shape and size. (Malaysia)