Acer miyabei (Miyabe's or Miyabe maple; Japanese: ã¯ãÂÂãÂÂã¤ã¿ã¤: kurobiitaya) is a species of maple native to Japan, where it occurs in Hokkaidà  and the Tà Âhoku region in northern Honshà «.
It is a small to medium-sized deciduous tree growing to 10âÂÂ20 m tall, with a trunk 30âÂÂ40 cm diameter with rough, grey-brown bark. The leaves are five-lobed (the basal pair of lobes usually small), 7âÂÂ20 cm long and 12âÂÂ20 cm broad, with a 5âÂÂ15 cm long petiole; the petiole bleeds white latex if cut. The flowers are produced in spring at the same time as the leaves open, yellow-green, in erect corymbs. The fruit is a samara with two winged seeds aligned at 180ð, each seed 8 mm wide, flat, with a 2 cm wing.
It is an endangered species, confined to scattered locations close to streams and rivers.
There are two varieties:
It is closely related to Acer miaotaiense from ChinaâÂÂsome authors treat this as a subspecies of A. miyabei, as Acer miyabei subsp. miaotaiense (P.C.Tsoong) E.MurrayâÂÂand to Acer campestre from Europe.
This tree is cultivated as an ornamental plant in the United States, but is not common in trade. It is most often found in arboreta. It withstands cold temperatures, urban conditions, and drought once established. It is a non-invasive substitute for Acer platanoides. A dense, uniform cultivar has been selected at the Morton Arboretum named Acer miyabei 'Morton' and marketed under the trade name State Streetî maple.