''Acer miyabei'' (Miyabe's or Miyabe maple; Japanese: クロビイタヤ: ''kurobiitaya'') is a species of

maple ''Acer'' () is a genus of trees and shrubs commonly known as maples. The genus is placed in the family Sapindaceae.Stevens, P. F. (2001 onwards). Angiosperm Phylogeny Website. Version 9, June 2008 nd more or less continuously updated since http ...

native to Japan, where it occurs in Hokkaidō and the

Tōhoku region The , Northeast region, or consists of the northeastern portion of Honshu, the largest island of Japan. This traditional region consists of six prefectures (''ken''): Akita, Aomori, Fukushima, Iwate, Miyagi, and Yamagata. Tōhoku reta ...

in northern Honshū.Rushforth, K. (1999). ''Trees of Britain and Europe''. Collins . It is a small to medium-sized

deciduous In the fields of horticulture and Botany, the term ''deciduous'' () means "falling off at maturity" and "tending to fall off", in reference to trees and shrubs that seasonally shed leaves, usually in the autumn; to the shedding of petals, ...

tree In botany, a tree is a perennial plant with an elongated stem, or trunk, usually supporting branches and leaves. In some usages, the definition of a tree may be narrower, including only woody plants with secondary growth, plants that are ...

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 Latex is an emulsion (stable dispersion) of polymer microparticles in water. Latexes are found in nature, but synthetic latexes are common as well. In nature, latex is found as a milky fluid found in 10% of all flowering plants (angiosperms ...

if cut. The

flower A flower, sometimes known as a bloom or blossom, is the reproductive structure found in flowering plants (plants of the division Angiospermae). The biological function of a flower is to facilitate reproduction, usually by providing a mechani ...

s are produced in spring at the same time as the leaves open, yellow-green, in erect

corymb Corymb is a botanical term for an inflorescence with the flowers growing in such a fashion that the outermost are borne on longer pedicels than the inner, bringing all flowers up to a common level. A corymb has a flattish top with a superficial ...

s. The

fruit In botany, a fruit is the seed-bearing structure in flowering plants that is formed from the ovary after flowering. Fruits are the means by which flowering plants (also known as angiosperms) disseminate their seeds. Edible fruits in particu ...

is a samara with two winged

seed A seed is an embryonic plant enclosed in a protective outer covering, along with a food reserve. The formation of the seed is a part of the process of reproduction in seed plants, the spermatophytes, including the gymnosperm and angiospe ...

s aligned at 180°, each seed 8 mm wide, flat, with a 2 cm wing.Les Erables
''Acer miyabei''
(in French) It is an endangered species, confined to scattered locations close to streams and rivers.Red List of Threatened Plants of Japan
/ref> There are two

varieties Variety may refer to: Arts and entertainment Entertainment formats * Variety (radio) * Variety show, in theater and television Films * ''Variety'' (1925 film), a German silent film directed by Ewald Andre Dupont * ''Variety'' (1935 film), ...

:Search for kurobiitay
(in Japanese)
; googl

/ref> *''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 ''Acer campestre'', known as the field maple, is a flowering plant species in the family Sapindaceae. It is native to much of continental Europe, Britain, southwest Asia from Turkey to the Caucasus, and north Africa in the Atlas Mountains. It has ...

'' from Europe.

Uses

This tree is cultivated as an

ornamental plant Ornamental plants or garden plants are plants that are primarily grown for their beauty but also for qualities such as scent or how they shape physical space. Many flowering plants and garden varieties tend to be specially bred cultivars that ...

in the United States, but is not common in trade. It is most often found in

arboreta An arboretum (plural: arboreta) in a general sense is a botanical collection composed exclusively of trees of a variety of species. Originally mostly created as a section in a larger garden or park for specimens of mostly non-local species, man ...

. It withstands cold temperatures, urban conditions, and drought once established. It is a non-invasive substitute for '' Acer platanoides''. A dense, uniform

cultivar A cultivar is a type of cultivated plant that people have selected for desired traits and when propagated retain those traits. Methods used to propagate cultivars include: division, root and stem cuttings, offsets, grafting, tissue culture ...

has been selected at the

Morton Arboretum The Morton Arboretum, in Lisle, Illinois, United States, is a public garden, and outdoor museum with a library, herbarium, and program in tree research including the Center for Tree Science. Its grounds, covering 1,700 acres (6.9 square kilometres ...

named ''Acer miyabei'' 'Morton' and marketed under the trade name State Street® maple.

References

External links

Miyabe Maple - ''Acer miyabei''
Diagnostic photos,

specimens
State Street® maple
Description and photos from Chicagoland Grows® {{Taxonbar, from=Q660569 miyabei Endemic flora of Japan Trees of Japan