Rhamnus californica ssp. ursina (Greene) C.B. Wolf  

Family: Rhamnaceae

California buckthorn, more...California buckthorn

[Frangula californica ssp. ursina (Greene) Kartesz & Gandhi, moreRhamnus californica var. ursima (Greene) C.B. Wolf, Rhamnus californica var. ursina (Greene) McMinn, Rhamnus tomentella ssp. ursina (Greene) Sawyer]