Japanese name: オオモミジ（大紅葉） Scientific name:Acer amoenum var. amoenum
[Overview]
A deciduous tree 12–15 m tall, growing in mountainous areas on the Pacific side.
The trunk is erect and the bark is grayish brown.
The leaves are opposite, 7–11 cm across, shallowly palmately divided into 7 lobes (5–9 lobes), and have regular teeth.
The leaf stalk is about 1/2–4/5 the length of the leaf.
Compared with Iroha-momiji and Yama-momiji, the leaves are slightly larger and the teeth are fine and even, which is characteristic.
The leaves turn red in autumn.
The flowers are borne 15–30 in compound corymbs arising from the leaf axils, with male and bisexual flowers on the same tree.
The flowers are 4–6 mm across, with 5 sepals and 5 petals. The petals are yellowish green to purple and the sepals are dark purple.
The fruits are borne in pairs, each with a propeller-like wing, and the wings spread at an obtuse angle.
[Cultivation]
Propagate from seed or by cuttings.
It prefers a well-drained site from partial shade to full sun.
Partial shade is better, especially while the tree is young.
In shade the autumn color develops poorly.
Longhorn beetles and aphids cause damage, so kill them as soon as they are found.
