Blue spruce (Picea pungens f. glauca), also called Colorado blue spruce, is a beautiful tree with blue-gray needles. Being colorful and relatively drought tolerant, it’s a favorite of many homeowners ...

Female (left) and male spruce cones at the Arnold Arboretum. It's a more common sight to see separate male and female cones like this. (Courtesy William "Ned" Friedman) Every spring the conifer trees ...

In this episode of ID That Tree, Purdue Extension forester Lenny Farlee introduces the White Spruce. This species is found in the North Woods of Northern Wisconsin and the Upper Peninsula of Michigan.

Spruce tree needles contain tiny gold particles — and they could indicate large gold deposits beneath the surface.

As you looked out the windows of your house this winter at all the dormant and barren deciduous trees in your landscape, perhaps you thought that a little green would be a nice addition this year. But ...

Bacteria inside Norway spruce needles convert dissolved gold from mineral-rich soils into solid nanoparticles, revealing a ...

A new study has, for the first time, uncovered a connection between bacteria living in Norway spruce needles and gold ...