Native: Western Coast United States

General Notes:

An Acer macrophyllum in Los Altos Hills is registered as a California Big Tree. It measures 61 feet high, with a trunk circumference of 174 inches and a crown spread of 76 feet.

Tree Characteristics

  • Drought tolerant.
  • Shape: Oval or Rounded
  • Foliage:  Deciduous, Palmate, Medium Green, Gold
  • Height: 30 - 75 feet.
  • Width: 30 - 50 feet.
  • Flowers: Inconspicuous. Fragrant Yellow. Flowers in spring.
  • Fruit: Brown or Mostly Green Winged Seed, Large (1.50 - 3.00 inches), fruiting in winter or summer.
  • Bark: Red Brown, Fissured.
  • Shading Capacity: Dense in Leaf, Moderate out of Leaf
  • Litter Issue is Dry Fruit.

Tree Site Conditions & Constraints

  • Zones: Sunset 2 - 9 and 14 – 24, USDA Hardiness 5-9
  • Exposure: Full Sun to Full Shade.

Pests & Disease Information

  • Resistant: Oak Root Fungus.
  • Susceptible: Beetle Borers, California Flathead Borer and Caterpillars, Sudden Oak Death, Root Rot, Oak Root Rot, Annosus Root Disease, White Mottled Rot, Leaf Spot and Verticillium.

Health, Safety & Environmental Concerns                                        

  • Branch Strength: Medium.
  • Root Damage Potential: High.
  • Health Hazard: Allergy
  • Biogenic Emissions: Moderate.
  • Attracts: Bees

Source:

SelecTree. "Acer macrophyllum Tree Record." 1995-2018. Feb 22, 2018. ​https://selectree.calpoly.edu/tree-detail/acer-macrophyllum

 

 

Updated: June 20, 2023