Southern Yellow Pine doesn't refer to any one species of tree, but rather a group of species which are classified as yellow pine

Yellow pine

Yellow pine may refer to the following:*Certain pines in the subgenus Pinus subgenus Pinus:**In American forestry, a term for several closely related species of pine with yellow tinted wood, including the Southern Yellow Pines , and the non-Southern yellow pines and several others...

 (as opposed to white pine

Pinus classification

There are three main subgenera of Pinus, the subgenus Strobus , the subgenus Ducampopinus , and the subgenus Pinus...

), and are native to the Southern United States

Southern United States

The Southern United States—commonly referred to as the American South, Dixie, or simply the South—constitutes a large distinctive area in the southeastern and south-central United States...

. They grow very well in the acidic red clay soil found in most of the region. The varieties include Loblolly, Longleaf, Shortleaf, and Slash pines. It typically has a density value between 50-55 lbs/cubic foot when pressurized.

Uses

Dimensional lumber and plywood

Plywood

Plywood is a type of manufactured timber made from thin sheets of wood veneer. It is one of the most widely used wood products. It is flexible, inexpensive, workable, re-usable, and can usually be locally manufactured...

products manufactured from Southern Yellow Pine are used extensively in home construction in the United States. They are also used for wooden roller coasters.