mustard tree
n 1: evergreen South American shrub naturalized in United
States; occasionally responsible for poisoning livestock
[syn: {tree tobacco}, {mustard tree}, {Nicotiana glauca}]
2: glabrous or pubescent evergreen shrub or tree of the genus
Salvadora; twigs are fibrous and in some parts of the world
are bound together in clusters and used as a toothbrush;
shoots are used as camel fodder; plant ash provides salt
[syn: {toothbrush tree}, {mustard tree}, {Salvadora persica}]