bastard indigo

definition: an erect to spreading hairy shrub of the Pacific coast of the United States having racemes of red to indigo flowers
example:
speech part: noun
synonyms: false indigo
definition: dense shrub of moist riverbanks and flood plains of the eastern United States having attractive fragrant foliage and dense racemes of dark purple flowers
example:
speech part: noun
synonyms: false indigo
definition: East Indian shrub
example:
speech part: noun
synonyms:

How bastard indigo is being used?