Aglaonema simplex (Blume) Blume

Medium, slender to somewhat robust, sub-pachycaul to suffruticose or decumbent, evergreen herbs. Stem erect, 15–120 cm tall, 0.4–1.7(–2.5) cm thick. Leaves several to rather many together, often clustered towards the shoot tips in larger plants; petioles 4.3–21.5 cm long; petiolar sheath with a membranous margin; leaf blade narrowly oblong, narrowly elliptic to lanceolate, occasionally linear, elliptic or ovate, 10–35 × 1.9–25 cm, base often unequal or oblique, obtuse, rounded or subtruncate, rarely acute or subcordate; apex often apiculate, acuminate, sometimes abruptly or gradually acuminate; primary lateral veins strongly differentiated, 3–14 per side; interprimary veins much less prominent, blade plain green, never variegated but the shade of green varying markedly between populations, thinly leathery. Inflorescences 1–6 together; peduncle 4–12 cm; spathe oblong-ovate, often apiculate, inflating at pistillate anthesis, then soon caducous at onset of staminate anthesis, 1.8–6.5 cm, decurrent for 3–15 mm, white; spadix cylindrical, equalling or slightly exceeding spathe, 1.7–4.3 cm, stipitate; stipe 2–12 mm; pistillate flower zone 3–10 mm long, with 12–38 flowers; staminate flower zone 1.5–3.8 × 0.5 cm, white, separated from the pistillate zone by a brief naked interstice; fruits ovoid-ellipsoid, 1–1.7 × 0.8 cm, green, ripening through yellow to bright red.