A new cultivar of Cercis Canadensis named `Greswan`, characterized by its continuous production of burgundy colored new foliage (both upper and lower surface) throughout the growing season, its multicolored effect when combined with mature green foliage, its burgundy stems and petioles, its distinctively heart-shaped leaves, its purple pink flowers emerging in early spring, its hardiness to U.S.D.A Zone 5, and its ease of propagation by budding.