Alder

Genus Alnus
Birch Family (Betulaceae)



Alder branch with catkins


Alder
(Alnus tenuifolia)

A small tree or shrub which is found growing near streams or in other moist places. The leaves and branches grow in an alternate pattern.

Notice the doubly toothed leaves. Each main tooth has tiny secondary teeth.


Mature alder catkins



In the spring it has both male (staminate) and female (pistillate) catkins. Later in the year the female catkins, containing the seeds, turn reddish brown and look like small cones.