The Alnus Viridis Subsp. Sinuata is commonly known as the Green Alder, Mountain Alder, Sitka Alder as well as Wavyleaf Alder.
The scientific name of Sitka alder Alnus viridis subsp. sinuata (Regel) Love & Loveis. It is a subspecies of green alder is Alnus viridis (Vill.) Lam. & DC. Green alder is a circumpolar taxon distributed across America, Europe, and Asia . It has been separated into the following two subspecies : Alnus viridis subsp. crispa (Aiton) Turill - mountain alder - northern North America, including northwestern N. America Alnus viridis subsp. sinuata (Regel) Love & Love - Sitka alder - northwestern North America Intermediate forms between these subspecies are found where their ranges overlap . This review is on Sitka alder.Sitka alder is distributed from central Alaska and the Yukon Territory south throughout British Columbia and western Alberta, and from Washington to northwestern California, east to Idaho and central Montana .Sitka alder is a seral shrub or small tree typically found on moist cool sites within western redcedar (Thuja plicata), western hemlock (Tsuga heterophylla), subalpine fir (Abies lasiocarpa), or Pacific silver fir (A. amabilis) forests in the Cascades and Rocky Mountains . Published classification schemes listing Sitka alder as an indicator species or as a dominant part of the vegetation in community types (cts) or habitat types (hts) are presented below: Area Classification Authority OR,WA general veg. cts Franklin & Dyrness 1973 OR:Eagle Cap general veg. cts Cole 1982 Wilderness OR:Monument Peak general veg. cts Aller 1965 wcID general veg. cts Curtis 1986 eWA,nID forest hts Daubenmire & Daubenmire 1968 ID forest hts Cooper & others 1987 cID grand fir/blue hkbry hts Steele & Geier-Hayes 1987 cID forest hts Steele & others 1981 MT forest hts Pfister & others 1977Some of the information provided here is attributed to:Uchytil, Ronald J. 1989. Alnus viridis subsp. sinuata. In: Fire Effects Information System, [Online]. U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory (Producer). , available at the USDA Fire Effects Information System (FEIS) website