It was a single-leaf pinyon pine, not a bristlecone pine. When we learn of a mistake, we acknowledge it with a correction. If you spot an error, please let us know at nytnews@nytimes.com. Learn more ...

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 ...

The Pinyon Pine matures to 10-20 feet tall and wide in ten years, developing a flat, rounded crown. It is an evergreen tree, meaning its leaves (needles) remain green all year long.

Almost all of Idaho’s pinyons, called single-leaf pinyons, are found in Cassia County along the Utah border. These tall desert pine trees produce a tasty little nut loved by critters and people ...

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 Nevada, Utah, New Mexico, California and Arizona.

Add to the long-studied global-warming perils of drought, insects, and wildfires, a new potential threat to the pinyon pine: dramatically lower production of seed-bearing cones.

Every fall for hundreds of years, the local Indians made their annual trek to the hills in search of the pine nuts that were necessary for their sustenance. The various tribes, including the Washoe, ...

A single-leaf pinyon pine under attack from black stain at City of Rocks National Reserve. Courtesy of City of Rocks National Reserve ...