Crataegus triflora is an uncommon 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,...

 species of the south-eastern U.S., of known by the common name three-flowered hawthorn.

It is a multi-stemmed shrub 3 to 5 meters tall. The flowers are quite large for hawthorn flowers, and occur in small clusters (not necessarily exactly three to a cluster). Although rarely cultivated, it can be very attractive if well grown..