Southern Yellow Pine is a generic term for four main species: loblolly, shortleaf, longleaf and slash pine. They grow mainly in the South East of the US in a wide geographic belt, stretching from East Texas to Virginia. Timber from all four species is classifed as Southern Yellow Pine and graded in accordance with the grading rules of the Southern Pine Inspection Bureau (SPIB), approved by the American Lumber Standard Committee (ALSC).