One of my favorites in the garden is the Red Bud (Cercis). It is hard to miss in the spring with its explosion of magenta. To me it looks Asian somehow – the clouds dark purple pink blossoms and crooked branches are reminiscent of Chinese silk paintings. Yet believe it or not, it is native to the eastern half of the US with zone 5 (Chicago area) being the upper reaches of its habitat.
Unlike any other tree that I am familiar with, the redbud blossoms appear in clusters in late April to mid-May, on bare stems before the leaves, and even on the trunk itself. After the blossoms fade away, the alternating heart-shaped leaves are very pretty.