Shrubby tree of the Pacific coast of the United States; yields cascara sagrada.

synonyms: bearberry, bearwood, cascara buckthorn, chittimwood, Rhamnus purshianus.

Deciduous tree of southeastern United States and Mexico.

synonyms: black haw, Bumelia lanuginosa, chittimwood, false buckthorn, shittimwood.

Shrubby tree of southern United States having large plumes of feathery flowers resembling puffs of smoke.

synonyms: American smokewood, Cotinus americanus, Cotinus obovatus.