Tree with dense, conical or rounded crown of often horizontal branches with beautiful white flower clusters. Flowers 0.3 in (0.8 cm) wide; with four greenish yellow petals; many crowded together in a head 1 in (2.5 cm) wide. Height: 50 ft (15 m). Diameter: 1 ft (0.3 m), rarely larger.
Moist soils in mountains in understory of coniferous forests.
Southwestern British Columbia south to western Oregon and in mountains to southern California; to 6,000 ft (1,829 m).