The term 'Southern Tree' refers to three different species of trees that are native to the Southern United States. The first is the PECAN, a deciduous tree that produces edible nuts and is native to the southeastern and south-central United States. The second is the Titi, an evergreen shrub or small tree that is native to the southeastern United States. The third is the Liveoak, an evergreen oak tree that is native to the southeastern United States. All three of these trees are common in the Southern United States and are important to the ecology of the region.