mexicana Oreomunnea mexicana is a species of plant in the family Juglandaceae, which grows in the tropical rain forests of Mexico, Guatemala, Nicaragua, Costa Rica, and Panama at altitudes from 1–1.7 km.

[2] O. mexicana grows to 30 m or more, up to 1.5m DBH, often with buttresses, and superficially resembles a walnut (Juglans sp.).

[2] The petioles of the opposite, coriaceous, pinnately compound leaves are glabrous at the base (O. pterocarpa is hirsute).

The upper surface of the leaf is glaucous; the underside has a light yellow-brown peltate bloom.

The fruit bears three wings on a globose nut, approximately 7 mm in diameter.