bigleaf

Bigleaf is most commonly a shortened reference to the bigleaf maple (Acer macrophyllum), a large deciduous tree native to western North America. It is known for its expansive, five-lobed leaves and its value in shade, timber, and urban forestry.

Growth typically ranges from 15 to 30 meters in height, with trunks up to about two meters in diameter. Leaves are broad and palmately lobed, reaching about 20–30 cm across. In autumn, foliage often turns yellow, orange, or russet before dropping.

Bigleaf maple occurs from southeastern Alaska through coastal British Columbia, Washington, Oregon, and into northern California. It favors moist, well-drained soils in coastal forests and riparian zones, often near streams, and it can tolerate a variety of moisture regimes.

It provides habitat and food for diverse wildlife. The tree supports lichens and mosses on its bark, and its seeds are part of the diet of some birds and small mammals. It plays a role in riparian ecosystems by stabilizing soils and contributing canopy cover.

Its wood is used for plywood, veneers, cabinetry, and carving; historically it was used by Indigenous peoples for various implements. It is also planted as an ornamental shade tree in parks and large landscapes.

While bigleaf maple is the primary reference, the term bigleaf can be used for other plants with large leaves in different regions, but such usage is less common.