Literally just 46 facts about CSU's trees
Drier conditions could doom Colorado spruce and fir trees, CU Boulder Today
What's Wrong with my Colorado Blue Spruce Tree?
Picea pungens, Colorado spruce
Augusta, ME : Blue Spruce At the University of Maine at Augusta Campus photo, picture, image (Maine) at
Colorado Blue Spruce, Horticulture, Landscape, and Environmental Systems
MSU Extension bulletin highlights alternatives to blue spruce - Landscaping
Colorado's Major Tree Species, Colorado State Forest Service
About the Colorado Blue Spruce, Colorado Blue Spruce, a relaxed evergreen tree that is indigenous to the Rocky Mountains. Its striking blue-green
Colorado Blue Spruce
The giants of Cornell - Cornell College