Japanese Maple 'Coral Bark'Acer palmatum 'Sango Kaku' Sango Kaku means coral tower or tower of sea coral, a reference to the unusual pink hue of this maples bark. That color is most vivid in winter, but the cultivar has plenty more tints to flaunt during other seasons. In spring, its emerging palmate and serrated yellow green leaves often are outlined with red, to coordinate with the hue of its flower clusters . The foliage gradually transitions to light green over summer, but