Alnus viridis

From Natural History of Southeast Alaska
Jump to: navigation, search
Sitka Alder: for more photos, see Sitka Nature Photo Gallery for Alnus viridis
Sitka Alder (Alnus viridis): Common deciduous tree-like shrub frequently found along shorelines and colonizing avalanche chutes or mud slide areas. Also found at treeline.

Collections from throughout much of the region, with a few gaps (none from Admiralty Island, for example). FNA suggests ssp crispa does not occur in the region, but rather the very similar ssp fruticosa occurs in the northern part of the region (approx. Juneau/Glacier Bay north).

From FNA account for ssp fruticosa: "This primarily subarctic Asian subspecies has long been mistaken in western North America for Alnus viridis subsp. crispa, which it closely resembles, or for subsp. sinuata (J. J. Furlow 1983b). It can be separated from the former by its larger and more coarsely toothed leaves, and from the latter by its much thicker, mostly single-toothed leaf blades."

Edit Species Characters

Local Notes

add location



Other References

  • Muller: (ssp sinuata) gen; forest edges, open areas, common: (ssp. crispa) ex NE; open areas
  • Hall 2010: (as A. crispa) Common to abundant colonizing thicket-forming species on mountain slopes, avalanche tracks, along stream banks shorelines and recently deglaciated lands.

Related Files