Stone oaks
Stone oaks is a genus in the beech family, Fagaceae, differing from Quercus in the erect spikes of insect-pollinated male flowers and the short styles with punctate stigmas on the female flowers. The World Checklist accepts 334 species, all native to Southeast Asia. Stone oaks trees are evergreen trees with leathery, alternate leaves, which may be either entire or toothed. The seed is a nut very similar to an oak acorn, but with a very hard, woody nut shell.