Spruce shrubs and trees are conifers from the genus Picea, which includes 35 species. Spruce trees and shrubs are characterized by a branch structure, called a pulvinus, where the needles attach. This ...

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 ...

Right now the tree that will soon rise from Millennium Park smothered in thousands of lights looks like a giant version of something you might use to scrub the gunk from a shower drain. But behold ...

Spruce resin may be familiar to many as incense. This sticky substance contains many different monoterpenes and is produced by spruce trees to ward off pests. When traveling to the Thuringian Forest ...

Adult spruce bark beetles in their galleries in the bark of a Norway spruce tree. The beetle in the middle is infected with the fungus Beauveria bassiana. Credit: Benjamin Weiss, Max Planck Institute ...