Diervilla sessilifolia, the southern bush honeysuckle,[1] a member of the honeysuckle family Caprifoliaceae which blooms in summer, is a perennial shrub found in the Great Smoky Mountains[2][3] and the southern Appalachian Mountains.[4] Southern bush honeysuckle can be found growing on bluffs, along slopes and stream banks, and bordering woodlands. It is a threatened species in Tennessee.[5]