Arizona is now home to 70 such champion ... with a slightly taller specimen in Yavapai County. The Phoenix native and former tree nursery owner now has six champs to his name, fourth best among ...

The Trump administration considers reducing Bears Ears monument size, raising concerns about cultural and environmental ...

As the Bryce Fire continues to blaze in Graham County, firefighters say their number one problem are salt cedar trees.

Aspen trees grow singly and in multi-stemmed clones over the widest distribution of any native tree species in North America ... southern Arizona, the Trans-Pecos region of Texas, and northern ...

Arizona's state tree is the palo verde ... North Carolina's state tree is the pine. Because eight species of pine are native to North Carolina, the state decided to not pick one over the other ...

In a well-documented process called “grassification,” invasive grass species have taken over Arizona’s deserts, increasing risks for neighboring forests and structures. Without grass, Sinclair argued, ...

PHOENIX— Federal land managers have allowed years of extensive damage from livestock grazing to streamside habitats vital for endangered plants and animals in Arizona and New Mexico ... Protecting ...