Called red alder, Oregon alder, or western alder, A. rubra is part of the Betulaceae family (the birches). The tree grows female cones and male catkins on the same branch. The bark is often marked by small to large white patches of lichen that thrive on certain trees.
Specimen recorded July 24, 2020, 18:04 at the all-weather field trailhead. About 20 – 30’ (6 – 9 m) tall.
Art by Nelson Spies, November 4, 2020. Pencil on medium surface paper.