Smooth Leaf Maple
Native to (or naturalized in) Oregon:
- Evergreen to semi-deciduous tree or shrub, to as much as 80 ft (24 m) in its native habitat, usually much smaller in cultivation, e.g., 20-30 ft [6-9 m]. Leaves opposite, simple, oblong-ovate to lanceolate, sometimes 3-lobed when young, 5-12 cm long, tip acuminate, base wedge-shaped or rounded, margin entire, 3-veined, leathery, upper surface smooth, dark green, below gray-green; new foliage red (pinkish bronze) at bud break. Flowers small, yellow-green, in short clusters, appearing with leaves. Fruit (samaras) 2.5 cm long, wings spreading at right angles to horizontal.
- Sun or light shade. Reportedly does best in moist, well-drained soil. Cold sensitive, can be grown in southern California and Arizona.
- Hardy to USDA Zone 9? Native to mountainous forests in the Himalayas (2000-3,900 ft), Nepal, Kashmir in India, Pakistan and southwestern China.
- Note: Acer oblongum var. macrocarpum is sometimes listed as an alternate name for the Leatherleaf Maple, Acer coriaceifolium (syn. Acer cinnamomifolium).