Rhamnus caroliniana (syn. Frangula caroliniana), the Carolina Buckthorn, is an upright shrub or small tree native to the Southeastern United States. There is a local disjunct population in Mexico as well.
Rhamnus caroliniana is usually around 12 to 15 feet high, but capable of reaching 40 feet in a shaded location. The most striking characteristic of this plant are its shiny, dark green leaves. The flowers are very small and inconspicuous, pale yellow-green, bell-shaped, appearing in leaf axils in late spring after the leaves. The fruit is a small (1/3 inch) round drupe; at first red, but later turning black with juicy flesh. It ripens in late summer.
Despite its common name, the Carolina Buckthorn is completely thornless.