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THINLEAF ALDER (Alnus tenuifolia)
SITKA ALDER (Alnus sinuata)
MOUNTAIN (GREEN) ALDER (Alnus crispa)
Other names: Alder, mountain alder, scrub alder.

VERY POOR

These are scrub alders found throughout most of the northern portions of the adjacent states and south into California along the Pacific slope. They are found allover Alaska as well. These alders seldom reach tree size, are more shrubs than trees, are short lived, not over about 40 years, and decay quickly when injured. There is no reported recovery of an original bearing tree of these species. 

Do not use for a bearing tree except as a "last resort". Use a mound of stone
as an additional accessory. If using as a bearing tree, see comments made for the red and white alders for marking recommendations.