Japanese name: エゾイタヤ（蝦夷板屋） Scientific name:Acer pictum subsp. mono
[Overview]
A deciduous tree growing in the mountains, reaching 25 m in height.
The trunk is erect.
The leaves are opposite, palmately divided into 5–7 shallow to medium lobes, without serrations.
The underside of the leaf is hairless except in the vein axils.
The base and upper half of the petiole have fine hairs.
The leaves turn yellow in autumn.
The flowers are borne in compound racemes at the branch tips, with male and bisexual flowers on the same tree.
The flowers have 5 sepals and 5 petals.
The petals are pale yellow.
The undersides of the sepals are hairy.
The fruits are borne in pairs, each with a propeller-like wing, spreading at an acute angle.
[Cultivation]
Propagate from seed or by cuttings.
It prefers a well-drained place in full sun to partial shade.
Partial shade is better, especially while the tree is young.
In shade, the autumn color develops poorly.
Damage from longhorn beetles and aphids occurs, so kill them as soon as they are found.
