Miyabe Maple

Arbor walk #2, TreeKeeper ID #3153

This tree is native to Japan, although it has become endangered within its own native range. This cultivar was introduced at the Morton Arboretum in Illinois.

This is a medium height tree. It has corky bark, is fast growing, and is adaptable to very cold temperatures. The fall foliage is bright yellow and makes the tree very attractive as an ornamental.

Common Name	Miyabe Maple
Latin Name	Acer miyabei
Indigenous Name(s)
Cultivar/Variety	‘Morton’
Commercial Name	STATE STREET

Global Distribution

coming soon

Where to find Arbor Walk #2 on WashU campus

Our Miyabe Maple in space

GPS Coordinates

N/A

Percent Concrete

N/A

Distance to Buildings

Year	Close Building #1	Close Building #2	Close Building #3
2020	Simon Hall, 20.25 m	Seigle Hall, 48.21 m	Anheuser Busch Hall, 91.65 m

Distance to Other Species

Year	Close Species #1	Close Species # 2	Close Species # 3
2020	Red Maple, 11.09 m	Seven-Son Flower, 11.14 m	Seven-Son Flower, 12.52 m

Our Miyabe Maple through time

Standard Measurements

Year	Height (m)	DBH (cm)	Caliper (m)	Crown Diameter N-S (m)	Crown Diameter E-W (m)	Average Crown Diameter (m)
2020	10.2386	22.4	N/A	5.24	4.36	4.8
2023	10.76	28.9	N/A	6.1	6.82	6.46

Nests and Pests

Year	Description
2020	At least 3 varieties of lichen Outgrown and ‘stained’/weeping bark ridge

How to identify a Miyabe Maple

Leaf Identification

The leaves are broad, simple, opposite, and have 3-5 lobes. They have rounded teeth and deep sinuses. The margins are entire. The color is dark green and semi-glossy on top and pubescent underneath. The petiole leaks milky sap when broken, but please do not harm the trees in our Arboretum. The leaves turn yellow in the fall.

Leaf of Arbor Walk #2
Underside of Leaf from Arbor Walk #2
Leaf (Fall) of Arbor Walk #2

Twig and Bud Identification

The twigs are slender, shiny reddish-brown with light lenticels (pores). The twigs have stout, pointed terminal buds that are pubescent and dark red with scales.

Twig of Arbor Walk #2
Bud of Arbor Walk #2

Bark Identification

The bark is deeply furrowed and corky. It is often very densely branched.

Bark of Arbor Walk #2

Fruit Identification

The fruits of the Miyabe Maple are double samaras with wings at 180º with pubescent (hairy) seed cavities. They mature from a light green color to a light brown.

Fruit of Arbor Walk #2
Fruit of Arbor Walk #2

Flower Identification

The flowers of the Miyabe Maple are greenish-yellow, small clusters that hang from a slender stalk. The flowers bloom in May.

Relationship of Acer miyabei to other species in the arboretum

Additional resources on the Miyabe Maple