Alnus viridis (Chaix) DC.
Green alder, mountain alder, Sitka alder, Siberian alder
Alders are small to medium in size, often with multiple trunks and branches. Green alders rarely exceed 15' (4.6 m) in height, about haf the size of other alders, a woody shrub rather than a tree. These fast-growing shrubs are often found beside wet areas. They are also common on mountains, especially in avalanche-prone regions, where their ability to regrow from damaged stumps allows them to out-compete other trees.
Identification: Green alders have lenticels—white or light gray patches, that are roughly diamond-shaped. See Alnus for a comparison table.
Alnus viridis (Chaix) DC. ssp. sinuata (Regel) Á. Löve & D. Löve at the Oregon Flora Image Project
Alnus viridis on Earl J.S. Rook's Flora, Fauna, Earth, and Sky ... The Natural History of the Northwoods
Alnus viridis on Wikipedia
Alnus viridis on Wikimedia Commons
Alnus viridis on CalPhotos
Alnus viridis at the University of Wisconsin-Green Bay Cofrin Center for Biodiversity
Alnus viridis on eFloras
Sibley, David Allen, The Sibley Guide to Trees, Alfred A. Knopf, 2009, pp. 159-165
Little, Elbert L., National Audabon Society Field Guide to North American Trees, Eastern Region, Alfred A. Knopf, 1980, p. 362
Alnus viridis description by Thomas H. Kent, last updated 7 Oct 2021.