Nature classifies all trees into three main groups. Deciduous trees shed leaves seasonally. Evergreen trees remain green year-round. Coniferous trees reproduce using cones. These categories explain ...

It may sound ridiculous to plant trees in the winter, but there are a few varieties in special conditions that may tolerate ...

Know all of the different options before you head out to the tree farm. In the meantime, you may want to learn about the different types of trees that are available—varieties like Douglas fir, blue ...

Trees are some of the largest and most widespread organisms on Earth, yet the true number of their species has been an enduring mystery. This lack of knowledge is detrimental to conservation efforts.

A new study created a comprehensive checklist of all tree species native to the contiguous United States. With 881 species now assessed for extinction threats, up to 16 percent of the tree species are ...

Spruce, beech and larch mixed forest, Val Raccolana, Italian Julian Alps, Italy. Scientists estimate that over 9,000 types of trees remain hidden in the world’s forests and elsewhere just waiting to ...