|Closely related to R. viscosum and R. serrulatum, R. oblongifolium is native to sandy soils in Arkansas, Oklahoma, Louisiana and Texas. It is a medium deciduous shrub; glandular, tubular flowers have a fragrance of lemony spice and are usually white but occasionally light pink. It is tolerant both of heat and deep shade.
The deciduous azalea is known for excellent fall color and unsurpassed spring flowers; it is usually less picky about soil, though it too prefers acid conditions. Though azaleas have a potentially large list of possible pest and disease problems, they are usually trouble free if planted correctly in proper cultural conditions.