page_title: Picea glauca
section_title: Varieties
hierarchical_section_title: Picea glauca / Varieties
caption_attribution_description: English: Picea glauca var. albertiana A dwarf Alberta white spruce in Los Angeles County Arboretum and Botanic Garden
context_page_description: Picea glauca, the white spruce, is a species of spruce native to the northern temperate and boreal forests in North America. Picea glauca was originally native from central Alaska all through the east, across southern/central Canada to the Avalon Peninsula in Newfoundland. It now has become naturalized southward into the far northern United States border states like Montana, Minnesota, Wisconsin, Michigan, Vermont, New Hampshire and Maine; there is also an isolated population in the Black Hills of South Dakota and Wyoming. It is also known as Canadian spruce, skunk spruce, cat spruce, Black Hills spruce, western white spruce, Alberta white spruce, and Porsild spruce.
context_section_description: Several geographical varieties have been described, but are not accepted as distinct by all authors. These comprise, from east to west:
  Picea glauca var. glauca (typical or eastern white spruce). From Newfoundland west to eastern Alberta, on lowland plains.
  Picea glauca var. densata (Black Hills white spruce). The Black Hills in South Dakota.
  Picea glauca var. albertiana (Alberta white spruce). The Rocky Mountains in Alberta, British Columbia and northwest Montana.
  Picea glauca var. porsildii (Alaska white spruce). Alaska and Yukon.
  The two western varieties are distinguished by pubescent (downy) shoots, and may be related to extensive hybridisation and/or intergradation with the closely related Engelmann spruce found further south in the Rocky Mountains. White spruce also hybridises readily with the closely related Sitka spruce where they meet in southern Alaska and northwestern British Columbia; this hybrid is known as Picea × lutzii.
caption: Dwarf Alberta white spruce in Los Angeles County Arboretum and Botanic Garden
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