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White Alder

Scientific Name:

Alnus rhombifolia




Riparian woodlands, usually with other riparian trees


Pacific Coast of North America and nearby western mountain ranges


Least Concern (IUCN Red List)

This species is


to the Truckee Meadows.


White alders are a species of birch tree that generally grow to between 15 and 80 feet in height. Their pale gray bark becomes scaly with age. White alders have alternating leaves that are 1.5 to 4 inches long, 1 to 2 inches wide, and have finely serrated edges. Their flowers grow in long clusters called “catkins”.

Fast Facts:

  • White alders are winter deciduous trees that grow at a rate of around 36 inches per year and can live to be 150 years old!

  • White alders are commonly found growing along permanent streams and rivers - keep an eye out when you’re near the Truckee River for these!

  • These trees are commonly favored as “shade trees” since their wide canopies provide cool shade for those who find themselves nearby. Aquatic animals and land animals are both known to seek refuge under white alders, while pileated woodpeckers and red-breasted nuthatches are known to build nests in their branches.



Bridget Mulkerin (research & content)

Alex Shahbazi (edits & page design)

Last Updated:

May 12, 2021 at 11:04:04 PM

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