Pinyon pine is also commonly called Colorado pinyon, nut pine, pinon pine, pinyon, Pinyon pine, two-leaf pinyon, two-needle pinyon. Pinyon is native to the southern Rocky Mountain region ...

Something is killing some of Idaho’s last remaining single-leaf pinyon pine trees. The worrisome mystery falls squarely in the lap of Wallace Keck, superintendent of City of Rocks National ...

“This is happening before our very eyes.” The state park near Almo marks the northernmost extreme of the single-leaf pinyon pine’s range. They’re more common in the south, found in ...