Oil palm tree has an erect trunk reaching a height of 4 to 10 meters. Leaves are numerous, 3 to 4.5 meters long. Petioles are broad, armed on the sides with spinescent, reduced leaves. Leaflets are numerous, linear-lanceolate, nearly 1 meter long, 2 to 4 centimeters wide. Male inflorescence is dense, having numerous, cylindric spikes which are 7 to 12 centimeters long and about 1 centimeter in diameter; the rachises excurrent as a stout awn. Female inflorescence is dense, branched, 20 to 30 centimeters long, the flowers densely disposed. Fruit is borne in large dense masses.