The U.S. Forest Service is encouraging Americans to cut down their Christmas trees at a nearby federally protected forest, and in a majority of participating locations, all it will cost is a mere ...

MISSOULA, Mont. — Christmas tree permits on Lolo National Forest will be available for purchase online or at a Lolo National Forest Office starting Nov. 9.

WASHINGTON — If you're a decorate for Christmas before Thanksgiving person, permits to cut your own tree on national forest land are now available. The USDA Forest Service announced Monday there ...

In forest experiments, tree species capable of high rates of photosynthesis grow more slowly than species with lower maximum rates of photosynthesis — with implications for tree-planting projects.

In Nevada's Humboldt-Toiyabe National Forest, the search is on for the most perfect tree of the many millions growing in the ...