greenweed

WORDNET DICTIONARY

greenweed(n = noun.plant) dyer's greenweed, dyer's-broom, dyeweed, genista tinctoria, whin, woadwaxen, woodwaxen - 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; Array

is a kind of broom

is a member of genista, genus genista

greenweed, n.

See Greenbroom. [1913 Webster]

greenweed, n. (dyer's greenweed) a bushy plant, Genista tinctoria, with deep yellow flowers.

For further exploring for "greenweed" in Webster Dictionary Online