Acer japonicum , commonly known as the or Downy Japanese Maple , is a deciduous species of maple native to Japan, Manchuria, and Korea. It is highly prized in landscaping for its slow-growing, multi-trunked form and its exceptionally vibrant autumn foliage, which often displays a "rainbow" of yellow, orange, and deep crimson hues. Physical Characteristics Acer japonicum - Plant Finder - Missouri Botanical Garden