it’s listed simply as “Tree 4126.” But the enormous alligator juniper has a history that transcends its drab catalog callout. Located in Prescott National Forest west of Granite Mountain ...

In order to grow properly, trees need an adequate period of warmth during their growing seasons; otherwise, the cell walls [… ...

Blue growth rings in woody plant stems indicate years when cells failed to lignify properly due to summers that were too cold ...

Curated by University of Colorado Boulder students under the direction of Sean Babbs (Instruction Coordinator for the Libraries' Rare and Distinctive Collections) and Suzanne Magnanini (Associate ...

Scientists studying tree rings in northern Norway have linked ‘blue’ rings, caused by cold summers, to volcanic eruptions ...

Old-growth juniper trees are a symbol of the American West. Their ancient and gnarled trunks and branches twist into haunting shapes immortalized in photos by Ansel Adams. East of Bend ...