Pinyon-juniper woodlands are a common sight in much of Utah. But pinyon trees are declining, while junipers are expanding.

To properly manage a tree, you need to know what species it is. Plus, tree identification is a lot of fun. Knowing a tree’s species is key to understanding their proper growing conditions, how to ...

As you approach spring landscaping chores, you might be considering adding a dogwood tree to your yard. But, when do dogwoods bloom? They typically flower between early spring and early summer, ...

A new global study of 46,752 tree species shows that many of them are under substantial pressure and poorly protected. The research team has also studied how this situation can be improved by ...

A study recently published in the journal Proceedings of the National Academy of Sciences describes the new estimate. More than a hundred scientists have used global forestry datasets from the Global ...

Filaments of fungi intertwine with the tips of tree roots to form underground networks that seem to benefit both organisms: the filaments, called hyphae, break down minerals in the soil that trees can ...

More than a third of all tree species worldwide face extinction, threatening ecosystems, plants, animals and economies around the world, experts warned Monday. In all, 38% of trees are at risk, ...

The oldest tree species is the Great Basin bristlecone pine (Pinus longaeva). The oldest tree of the species is named Methuselah and is more than 4,800 years old. The longevity of the Great Basin ...

Summers in Boulder are hot and getting hotter. But the large trees that occupy the city’s parks, yards and green spaces can provide a welcome patch of shade for pedestrians, critters and understory ...