Rhamnus lanceolata

Rhamnus lanceolata, the lanceleaf buckthorn, is a shrub species in the Rhamnaceae (buckthorn family), native to about 20 states in the south-central and midwestern US.

Taxonomy
Rhamnus lanceolata contains the following subspecies:
 * Rhamnus lanceolata subsp. glabrata
 * Rhamnus lanceolata subsp. lanceolata