| 1. mustard tree [ Synonyms: nicotiana glauca, tree tobacco] | |
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Evergreen South American shrub naturalized in United States; occasionally responsible for poisoning livestock
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| 2. mustard tree [ Synonyms: salvadora persica, toothbrush tree] | |
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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
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