1. tree tobacco, mustard tree, Nicotiana glauca, tobacco, tobacco plant
usage: evergreen South American shrub naturalized in United States; occasionally responsible for poisoning livestock
2. toothbrush tree, mustard tree, Salvadora persica, fruit tree
usage: 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