[Alders: The Genus Alnus in the Columbia River Gorge of Oregon and Washington]

Green Alder, Siberian Alder, Sitka Alder, Slide Alder, Wavy-leaf Alder, Wavy-leaved Alder

Alnus viridis ssp. sinuata

Synonyms: Alnus alnobetula, , Alnus alnobetula ssp. sinuata, Alnus crispa ssp. laciniata, Alnus crispa ssp. sinuata, Alnus sinuata, Alnus sitchensis, Alnus viridis ssp. fruticosa, Alnus viridis var. sinuata, Duschekia sinuata

Note: This species is known as Alnus alnobetula ssp. sinuata in Oregon.

Leaves of Green Alder, Siberian Alder, Sitka Alder, Slide Alder, Wavy-leaf Alder, Wavy-leaved Alder: Alnus viridis ssp. sinuata (Synonyms: Alnus alnobetula, Alnus crispa ssp. laciniata, Alnus crispa ssp. sinuata, Alnus sinuata, Alnus sitchensis, Alnus viridis ssp. fruticosa, Alnus viridis var. sinuata, Duschekia sinuata)

Close-up of newly emerged leaves of Sitka alder. Note the shiny green dorsal leaf surface and the sharply-toothed margins (the teeth are largely of the same length).

Pendant male catkins and newly emerged leaves of Green Alder, Siberian Alder, Sitka Alder, Slide Alder, Wavy-leaf Alder, Wavy-leaved Alder: Alnus viridis ssp. sinuata (Synonyms: Alnus alnobetula, Alnus crispa ssp. laciniata, Alnus crispa ssp. sinuata, Alnus sinuata, Alnus sitchensis, Alnus viridis ssp. fruticosa, Alnus viridis var. sinuata, Duschekia sinuata)

The pendant male catkins and newly emerged leaves of Sitka alder.
Paul Slichter