noun
much-branched erect herb with bright yellow flowers; distributed from Massachusetts to Florida
• Syn: ↑indigo broom, ↑rattle weed, ↑Baptisia tinctoria
• Hypernyms: ↑wild indigo, ↑false indigo
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nounEtymology: so called from its supposed ability to drive away horseflies
Useful english dictionary. 2012.