Northwest U.S. & Southwest Canada

5 Needle Pine Regional Key

This region includes Alberta and British Columbia in southwest Canada, and Idaho, Montana, Oregon, and Washington in the northwest United States. Four species of 5 needle pine are known to occur in this region: Limber pine (Pinus flexilis), Sugar Pine (P. lambertiana), Western White Pine (Pinus monticola), and Whitebark Pine (Pinus albicaulis). A dichotomous key to the 5 needle pines of this region is provided below. Many of leads in the key follow from Kral et al. (2022). Photos of seed cones of the 5 needle pines in this region are presented below the key.

Pinus albicaulis (Whitebark Pine). Photo by Aaron Wells.
Pinus flexilis (Limber Pine). Photo by Steven B Brown CCBY-NC.
Pinus monticola (Western White Pine). Photo by John D Reynolds CCBY-NC
Pinus_lambertiana (Sugar Pine). Photo by John Waaben CCBY-NC.
Photos of immature seed cones of 5 needle pines in the U.S. northwest and southwest Canada region.

Literature Cited

Kral, R. 2022. Pinus. In: Flora of North America Editorial Committee, eds. 1993+. Flora of North America North of Mexico [Online]. 22+ vols. New York and Oxford. Vol. 2. http://beta.floranorthamerica.org/Pinus. Accessed [2022-09-11].

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