Which plant is referred to as Winter King Green Hawthorne?

Winter King Green Hawthorne is indeed referred to as Crataegus viridis 'Winter King.' This cultivar of Hawthorne is notable for its hardiness, resistance to diseases such as fire blight, and its impressive ornamental features. It boasts a dense, rounded crown and produces beautiful white flowers in spring, followed by dark red berries in late summer that can attract birds. The foliage has a glossy texture and turns an attractive purple in the fall, further adding to its landscape appeal.

Other choices in the question include plants that do not share the same characteristics or classifications as the Winter King Green Hawthorne. For example, Cercis canadensis, commonly known as Eastern Redbud, is a flowering tree known for its pink-purple blooms, which does not align with the descriptions of the Hawthorne cultivar. Chamaecyparis pisifera 'Golden Mop' refers to a type of false cypress known for its golden foliage and shrub-like form, while Chionanthus retusus, or Chinese fringetree, is valued for its striking white flowers in spring but lacks any relation to the Hawthorne. Thus, Crataegus viridis 'Winter King' stands out as the accurate identification of the specified plant.