Coral bark maple trees are Japanese maples with four seasons of interest in the landscape. In spring, its seven-lobed, simple palmate leaves open in a bright lime green or chartreuse colour. As spring turns to summer, these leaves turn a deeper green. In autumn, the foliage turns golden yellow and orange. And as the foliage drops in fall, the tree’s bark begins to turn an attractive reddish pink, which intensifies with the cold weather.