dyer's-broom
Webster's Dictionary (GCIDE)
dyer's broom \dyer's broom\, dyer's-broom \dyer's-broom\n. small Eurasian shrub (Genista tinctoria) having clusters of yellow flowers that yield a dye; common as weed in England and U.S.; sometimes grown as an ornamental.
Syn: woodwaxen, dyer's greenweed, dyer's weed, dyer's rocket, dyeweed, greenweed, whin, woadwaxen, Genista tinctoria. [WordNet 1.5]
WordNet 3.0
dyer's-broom n 1: small Eurasian shrub having clusters of yellow flowers that yield a dye; common as a weed in Britain and the United States; sometimes grown as an ornamental [syn: woodwaxen, dyer's greenweed, dyer's-broom, dyeweed, greenweed, whin, woadwaxen, Genista tinctoria]