Not only was it the nation's largest cottonwood for many years, it was Arizona's largest known tree of any size, said Ken Morrow, the state coordinator for the national big tree program.

These trees like wet conditions and ... known as the western cottonwood or the Rio Grande cottonwood, occurs in California east to Utah and Arizona and south into northwest Mexico.

That particular cottonwood ranks as the 10th largest ... “That’s one that will take your breath away,” Arizona’s Magnificent Trees coordinator said. “It’s the champion of the champions.” ...

PHOENIX — Amid the Arizona heat, researchers are finding Fremont Cottonwood trees can cool themselves down, but their survival depends on consistent water access. The trees essentially sweat ...

Cottonwood trees are emblematic of the American Southwest ... A recently published study co-authored by Northern Arizona University researchers shed new light on how cottonwoods cope with ...

Cottonwoods are fast growing trees in Populus genus. These trees are hardy to zones 2 through 9. Cottonwood trees produce cotton every other year. They preserve their resources. There is a ...

A 105-foot cottonwood tree that was cut out of a Billings backyard last week might have some life left in it. When news of the tree’s demise reached Marty Flanagan, he knew he wanted a piece.