Acer miyabei

Classification System: APG IV

Superregnum: Eukaryota
Regnum: Plantae
Cladus: Angiosperms
Cladus: Eudicots
Cladus: Core eudicots
Cladus: Rosids
Cladus: Eurosids II
Ordo: Sapindales

Familia: Sapindaceae
Subfamilia: Hippocastanoideae
Tribus: Acereae
Genus: Acer
Species: Acer miyabei
Subspecies: A. m. subsp. miaotaiense – A. m. subsp. miyabei
Name

Acer miyabei Maxim., Bull. Acad. Imp. Sci. Saint-Pétersbourg, sér. 3, 32: 485 (1888).
References

Diagn. pl. nov. Asiat. Bulletin de l'Academie Imperiale des Sciences de Saint-Pétersbourg 32: 485; & Mélanges Biol. Bull. Phys.-Math. Acad. Imp. Sci. Saint-Pétersbourg 12: 725 (1888).
USDA, ARS, Germplasm Resources Information Network. Acer miyabei in the Germplasm Resources Information Network (GRIN), U.S. Department of Agriculture Agricultural Research Service. Accessed: 08-Apr-12.

Vernacular names
Deutsch: Miyabes Ahorn
English: Miyabe's Maple
français: Érable de Miyabe
日本語: クロビイタヤ：
русский: Клён Миябе

Acer miyabei (Miyabe's or Miyabe maple; Japanese: クロビイタヤ: kurobiitaya) is a species of maple native to Japan, where it occurs in Hokkaidō and the Tōhoku region in northern Honshū.[2]

It is a small to medium-sized deciduous tree growing to 10–20 m tall, with a trunk 30–40 cm diameter with rough, grey-brown bark. The leaves are five-lobed (the basal pair of lobes usually small), 7–20 cm long and 12–20 cm broad, with a 5–15 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 180°, each seed 8 mm wide, flat, with a 2 cm wing.[2][3]

It is an endangered species, confined to scattered locations close to streams and rivers.[2][4]

There are two varieties:[5]

Acer miyabei var. miyabei. Samaras downy.
Acer miyabei var. shibatai (Nakai) Hara. Samaras hairless.

It is closely related to Acer miaotaiense from China—some authors treat this as a subspecies of A. miyabei, as Acer miyabei subsp. miaotaiense (P.C.Tsoong) E.Murray—and to Acer campestre from Europe.[2][3][6]
Uses

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 Street® maple.
References

Harvey-Brown, Y. (2020). "Acer miyabei". IUCN Red List of Threatened Species. 2020: e.T62939A103449728. doi:10.2305/IUCN.UK.2020-1.RLTS.T62939A103449728.en. Retrieved 20 November 2021.
Rushforth, K. (1999). Trees of Britain and Europe. Collins ISBN 0-00-220013-9.
Les Erables: Acer miyabei (in French)
Red List of Threatened Plants of Japan
Search for kurobiitaya (in Japanese) Archived March 19, 2004, at the Wayback Machine; google translation
Tingzhi Xu; Yousheng Chen; Piet C. de Jong; Herman John Oterdoom & Chin-Sung Chang. "Acer miaotaiense P. C. Tsoong, Bull. Misc. Inform. Kew. 1954: 83. 1954". Flora of China. Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA. Retrieved 12 May 2016.