Native to (or naturalized in) Oregon:
- Deciduous tree, to 30-35 ft (7-11 m) high, upright habit, often multi-stemmed. Bark green (sometimes red?), striped white when young, becoming grayer as it matures. Leaves opposite, simple, to 6-12 cm long, 3-lobed (occasionally 5), side lobes pointing outward, rounded at base, margin irregularly double serrated, dark green above, lighter green below with brown or reddish pubescence on veins, petiole stiff, to 6 cm; fall color yellow to scarlet. Flowers greenish yellow, in 8 cm erect clusters (racemes), appear after the leaves. Fruit wings, each 2 cm, spread at 90° to 120° angle.
- Partial shade to full sun
- Hardy to USDA Zone 5 Native to Japan, stands found in drier locations from the middle to upper forest slopes (Vertrees, 1987).
- rufinerve: red- veined or -nerved, a reference to the veins on the underside of young leaves that are covered with rusty-red hairs. By the end of summer this is reduced to tufts in the vein-axils.
- Silverton, Oregon: The Oregon Garden
- Portland, Oregon: Hoyt Arboretum