Bigleaf Maple – Acer macrophyllum photo index

Young BigLeaf Maple Tree in commercial setting Large Bigleaf Maple Tree in Park BigLeaf Maple photo 3 - Leaf Detail

Bigleaf Maple Seeds BigLeaf Maple Trunk in rain forest covered with moss BigLeaf Maple - Acer macrophyllum Flower - photo 6

Bigleaf Maple – Acer macrophyllum photo index

  • The Bigleaf Maple – Acer macrophyllum is a large Deciduous tree, it will grow from 50 to 100 ft becoming rounded when mature.
  • Root system is shallow – not suited for lawn planting except in park settings.
  • Leaves are huge – the largest of all maples, can be up to 18 inches long, opposite, simple, lustrous dark green above, pale beneath, 3-5 toothed lobes, petiole yields milky sap when detached.
  • Flowers in early spring before leaves appear, the flowers are small, 10 mm across, greenish-yellow, fragrant, in drooping clusters, 10-15 cm long, male and female flowers occur in the same cluster.
  • Seeds – Fruit (double samara), large, 4 cm long, hang down in racemes, seeds very pubescent.
  • Foliage yellow to gold or brown in fall.
  • Locations – Sun to part spade.  Prefers a cool moist environment as that in the Pacific Northwest.
  • Hardy to USDA Zone 5/6
  • Native from southwest British Columbia to southern California, from sea level to 5,500 ft (1,650 m).
  • Because the bark of this tree retains moisture, in the Pacific Northwest its trunk and large branches are often covered with mosses, liverworts, and ferns.  Its sap has a high sugar content, but early spring weather in its range is generally not conducive to a high flow of sap.  When cut down, the remaining stumps will sprout and grow vigorously, reaching over 3 m (9.8 ft) in a single year.