It is in leaf all year. A tree suffering from oak wilt should be removed from the area and destroyed. Japanese evergreen oak is native to Japan, South Korea, Taiwan, and parts of China. This species, Quercus acuta, is often confused in commerce with other evergreen oak species such as Quercus glauca and Quercus myrsinifolia. The leaves are oblong and the flowers are yellowish. Explore our plant database and build your plant list. The dark green, glossy leaves, 2.5 to 5 inches long, have wavy-margins and … The center lobe is considerably longer than the others and quite narrow. Find more Japanese words at wordhippo.com! The Sawtooth Oak is botanically called Quercus acutissima. The cutleaf Japanese Emperor oak is certainly a plant for a collector of the plant kingdom's tree oddities. It was introduced in the United States in 1878. The leaves of the southern red oak have a bell-shaped base, are 5-9" long with 3-7 deep lobes. Suitable for: medium (loamy) and heavy (clay) soils. Insects can also cause the leaves of an oak to prematurely yellow. Various wasps build structures known as leaf galls on the foliage of an oak. Mon (紋), also monshō (紋章), mondokoro (紋所), and kamon (家紋), are Japanese emblems used to decorate and identify an individual, a family, or (more recently) an institution or business entity. While mon is an encompassing term that may refer to any such device, kamon and mondokoro refer specifically to emblems used to identify a family. These structures are rarely fatal to the tree but their presence can drain vigor from the foliage. There are bristle tips (tiny hairs) on the end of each lobe (you will not find these bristle tips on the end of the white oak leaf). Learn more about Quercus dentata 'Pinnatifida' - Feather-Leaf Japanese Oak from The Plantium. Fine in foliage but excessively slow in growth, this tree will befuddle most who gaze upon it. 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