red alder (Alnus oregona) (fig. 24) occurs from Alaska to southern California.
red alder is the largest of the alder group in this country.
red alder when thoroughly air dry weighs about thirty pounds per cubic foot, which is slightly above the weight of basswood.
The Oregon or red alder reaches eighty feet in height and its trunk may exceed three feet in diameter.
red alder is given that name because the newly cut wood is liable to change quickly to a reddish-brown.
Where this tree and red alder occupy the same range they are commonly supposed to be the same.
The wood of white alder is five pounds lighter per cubic foot than red alder.
The white alder ought to be suitable for nearly every purpose for which red alder is used.