Acer palmatum O kagami
The plump, rounded leaves of 'O kagami' emerge a purplish-red in spring. The shiny blackish red leaves of summer is what probably gave this cultivar its name, which means "mirror". Bright scarlet fall color is best when grown in full sun, but can range from orange to green in shade. 'O kagami' can grow to a height of 16 feet in ten years.