FLAGSTAFF, Ariz. (AP) — As flurries started to descend on the forest floor, a team of researchers examined a stand of sickly quaking aspen trees off U.S. Highway 180, just north of Flagstaff. To an ...

Aspen trees are already stressed in Arizona. They're at the southern end of their range and higher temperatures with less precipitation has added pressure in an already hostile environment.

Arizona's aspen trees are a fall favorite, but an emerging invasive insect species called oystershell scale may be putting their future at risk.

Arizona's Aspen trees are an iconic symbol of fall, drawing in thousands of hikers and photographers to the high country every year. However, research out of Northern Arizona University suggests ...

Aspen trees and their changing leaves attract visitors to northern Arizona every fall. These trees were photographed at Lockett Meadow near Flagstaff October 11, 2016.

FLAGSTAFF — Beneath the scenic yellow and red leaves of soaring aspen trees in the Kachina Wilderness, forest ecologist Mike Stoddard is looking down. His concern isn’t the brilliant fall ...

Aspen trees tend to have rough bark that ranges in color: greenish or yellowish, grey, white, or a mix. ... southern Arizona, the Trans-Pecos region of Texas, and northern Nebraska.

TUCSON, Ariz. (KVOA) — The Aspen and Bighorn fires were devastating to the top of the Catalina Mountains and in a natural world it would take decades to replenish those trees. Thankfully there ...

Ask the Master Naturalist: By any name — aspen or popple — these trees thrive in Minnesota In Minnesota we have two native aspens — quaking aspen (populus tremuloides) and bigtooth aspen ...

DENVER — Something is killing the quaking aspen trees of the Rocky Mountain West. The slender, white-barked trees that paint the hills gold every autumn are dying, some scientists say, leaving ...

Tristan Clum of member station KNAU reports on documenting dendroglyphs...tree carvings...near Flagstaff, Arizona. Starting in the late 1800's, sheepherders, many of from the Basque region of ...