Three Flowered Maple
Native to (or naturalized in) Oregon:
- Deciduous tree, sometimes a shrub, may reach 20-30 ft (6-9 m) high in cultivation, similar spread, dense and rounded form. Bark yellowish-brown, weakly exfoliating in patches. Leaves opposite, compound [trifoliate, i.e., 3 leaflets], leaflets ovate-lanceolate, 5-7 cm long and 2.5 cm wide, tip acuminate, base wedge-shaped, that of basal leaflets uneven, margins have prominent hairs, dark green, becoming yellow, orange and/or scarlet in fall; petiole 5-7.5 cm long. Flowers yellow, 3 per clusters (umbels), clusters at the terminals of short 2-leaved shoots. Fruit (samaras) 4-5 cm long, wings spreading at an angle of about 120°, nutlets thick and hairy (somewhat similar to those of Acer griseum but more hairy).
- Sun to partial shade. Best in acid, moist, well-drained soil.
- Hardy to USDA Zone (4)5 Native to the hill of northern China and Korea, abundant but not forming forests (van Gelderen and van Gelderen, 1999).
- triflorum: a reference to its 3 flowers per cluster.