The Lithocarpus corneus, most commonly known as "edible acorn", is an evergreen, nut bearing tree, native to China but ranging from Eastern Asia to Southern Vietnam. Lithocarpus corneus is a member of the Fagaceae family the genus Lithocarpus.

There are over 300 species of the Lithocarpus. The tree grows up to 15m in height in elevations generally below 1000 meters and it is close related to the oak tree.

Leaves commonly are backed up at apex of branches with a papery to leathery texture. A mulch of the dry leaves repels slugs, etc, although fresh leaves shouldn't be used as these could suppress plant growth. The flowers are small monoecious; individual flowers are either male; catkins, or female, but both genders can be found on the same plant.

The nuts of the Lithocarpus corneus are as thick-walled as the hickory tree nut. The kernels are white and the shape of a long flat acorn. They have a sweet, agreeable flavor. In China they boil or roast this sweet nut. Roasted nuts are sold in local marketplaces in China just like roasted chestnuts.

The nuts of the edible acorn are a source of vitamin C and starch and are reported to be high in calcium, magnesium and phosphorus. When compared to wheat or barley, acorns are somewhat lower in carbohydrates and protein content but are higher in fat and fiber content.

The kernels of the edible acorn nut are eaten raw or cooked. They can also be ground into a meal and utilized as a thickening in soups or be added to grain flours when making bread. In general, they can be dried out in full sun for one to two days or roasted in a small oven to extend storage.

Propagation of the edible acorn tree is by seed, best planted as soon as it is ripened in the autumn. Germination happens in the wintertime or early springtime. The seed has a short viability but could be stored for a few months if kept in a cool and slightly damp place- the vegetable compartment of a refrigerator is a good storage place.

Lithocarpus corneus can grow well in most types of soil and in full sun or semi-shade. It needs however moist soil. Trees should be planted in their permanent places while plants young and no later than the second year, or they might transplant very poorly.

edible acorn, Lithocarpus corneus

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The key to successful fruit and nut production is the provision of a beneficial environment for the trees that bear them.