Crataegus harbisonii is a species of hawthorn

Crataegus

Crataegus , commonly called hawthorn or thornapple, is a large genus of shrubs and trees in the rose family, Rosaceae, native to temperate regions of the Northern Hemisphere in Europe, Asia and North America. The name hawthorn was originally applied to the species native to northern Europe,...

that was originally described from Nashville, Tennessee, and is closely related to C. ashei. Currently, only one individual is known to survive in the wild, but the species has been taken into cultivation. It forms a vigorous shrub to 8 m in height with hairy leaves, attractive flowers and round reddish fruit.