A Fir Tree
Just as the tropics have their gum producing plants, such as the rubber tree, so do the temperate and arctic zones have their gum producers in the firs and pines and other evergreens. The tree shown here is a fir which Mr. Burbank is observing by reason of the quantity and quality of its exudate.
This image is from: Luther Burbank: his methods and discoveries and their practical application. Volume 11 Chapter 8