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 ...

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 ...

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 ...

A new first-of-its-kind report on the conservation status of all 881 native tree species in the contiguous U.S. highlights the problem, finding that at least 1 in 9 species are now threatened with ...

Meanwhile, many fast-growing, non-native tree species have been introduced to Caribbean Islands. They are now common across Puerto Rico and the USVI, as many can quickly colonize deforested and ...

The rapid decline of the species could signify a similar fate for other plants. A type of tropical cactus native to the Florida Keys has become the first species in U.S. history to become extinct ...