It currently has national champions for 780 tree species, including 87 from Arizona. The big cottonwood was essentially discovered in 1970 by Don Richard, a U.S. Forest Service range manager in ...

The aspen tree (Populus tremuloides) is the most widely distributed tree species in North America ... of Washington and California, southern Arizona, the Trans-Pecos region of Texas, and northern ...

living tropical tree species. The unprecedented find was made in Brunei, a country on the large island of Borneo, and reveals a critical ...

May 22, 2025 — An analysis of 900 species over a 20-year period showed that biodiversity enhances ecosystem stability and helps safeguard natural communities in a changing ... Ox-Eye Daisy ...