If you want to eat a pine tree, there’s more than just bark. Globally, there are about two-dozen pine species with seeds large enough to merit the trouble of harvesting. Many of these are native to Europe and Asia, but there are three available in the western United States. This group is called pinyon pine, and the three main species for nut production are the Colorado pinyon (Pinus edulis), the single-leaf pinyon (Pinus monophylla), and the Mexican pinyon (Pinus cembroides). These small seeds are fatty, soft, and delicious. They can be eaten raw or cooked. One hundred grams of pine nuts have approximately 640 calories and 10 percent of your daily allowance of potassium.