mustard tree

Noun

• 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

• evergreen South American shrub naturalized in United States; occasionally responsible for poisoning livestock

Related words

• Synonyms: 
  toothbrush tree , Salvadora persica , tree tobacco , Nicotiana glauca