Lithocarpus encleisacarpus grows as a tree up to tall with a trunk diameter of up to . The greyish brown bark is smooth or scaly or lenticellate. The coriaceous leaves measure up to long and have obscure tertiary web-like reticulations. Its dark brown acorns are ovoid to roundish and measure up to across. The fruits typically have 1-1.5 cm stalks and the cupule has several smooth to slightly ridge-like lamellae circling or spiraling around the outside. The nuts are free from the cupule and have silvery tomentum.
