Thorns up to three inches long are a liability and an asset, so try thornless cockspur, Crataegus crusgalli var. inermis. Why we love it: Hawthorns are easy-to-grow trees that tolerate drought, grow ...

Written by Smithsonian botanist W. John Kress, the book details more than 300 North American tree species in words, maps and photographs—and why we shouldn’t take them for granted Jennie ...

Trees are often hailed as the lungs of our planet, but their importance extends far beyond their ability to produce oxygen. In a world grappling with climate change, deforestation, and environmental ...

Trees first appeared around 400 million years ago. They survived the mass-extinction event that wiped out the dinosaurs some 66 million years ago and lived through several glacial periods ...

Despite its exalted namesake, the Tree of Heaven is a legitimate nightmare to control. The fast-growing tree — up to 1 inch a week in some documented instances, according to botanist John Knapp ...

It’s 4 p.m. in Joshua Tree National Park and the air temperature is hovering around 99 degrees — relatively mild for an August afternoon. But at ground level, the sand along the popular Hidden ...