The Genus Picea is a group of coniferous trees commonly known as spruces. This group includes several species that are native to northern regions of the world. The most commonly known species is the Picea abies, which is also called the Norway spruce. Another species of the Genus Picea is the Picea glauca, also known as the white spruce. This tree is often found in North America and is used for paper production and lumber. Other species of the Genus Picea include Picea mariana, Picea sitchensis, and Picea rubens. These trees are known for their unique foliage, with thin, needle-like leaves that grow in a spiral pattern around the stem.