white alder (Alnus rhombifolia)

Native: California, Western North America from the Sierra Nevada to Montana.

General Notes:

An Alnus rhombifolia in Devil's Punchbowl is registered as a California Big Tree. It measures 94 feet high, with a trunk circumference of 127 inches and a crown spread of 46 feet.

Tree Characteristics

  • Shape: Conical
  • Foliage: Deciduous, Rhomboidal, Medium to Dark Green, Bronze or No Change
  • Height: 50 - 90 feet.
  • Width: 40 - 70 feet
  • Flowers: Inconspicuous. Green or Yellow. Flowers in Spring.
  • Fruit: Prolific, Brown or Orange Cone, Medium (0.50 - 1.50 inches), fruiting in Fall, Winter or Summer.
  • Bark: Light Gray, Fissured.
  • Shading Capacity: Dense in Leaf, Moderate to Dense out of Leaf.
  • Litter Issue: Dry Fruit.

Tree Site Conditions & Constraints

  • Zones: Sunset 1 - 10 and 14 – 21, USDA Hardiness 8 - 11.
  • Exposure: Full Sun to Partial Shade.

Pests & Disease Information

  • Susceptible: Aphids, Beetle Borers, Caterpillars and Spider Mites, Powdery Mildew.

Health, Safety & Environmental Concerns

Branch Strength Medium.

Root Damage Potential High.

Health Hazard: Allergy

Attracts: Birds.

Source:

SelecTree. "Alnus rhombifolia Tree Record." 1995-2018. Mar 20, 2018.
< https://selectree.calpoly.edu/tree-detail/alnus-rhombifolia >

 

 white alder
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