Acer opalus seed
Acer opalus is a medium-sized deciduousgrowing to 20 metres (66 ft) tall, with a trunk up to 1 m diameter.
The leaves are glossy green, 7–13 centimetres (2.8–5.1 in) long and 5–16 centimetres (2.0–6.3 in) across, palmately lobed with blunt teeth.
They turn yellow in autumn. The bark is grey and pink. It peels in square plates. It has small yellow flowers that open before the leaves appear.