The Buckthorn Family in the Deserts and Mountains of the American Southwest
Rhamnaceae
Desert Ceanothus, Gregg Ceanothus: Ceanothus greggii
Ceanothus: The Genus Ceanothus
Buckthorns: The Genus Rhamnus
Abrojo, Crucillo, Lotebush and Jujubes: The Genus Ziziphus