From The Collaborative International Dictionary of English v.0.48 [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]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Broom \Broom\ (br[=oo]m), n. [OE. brom, brome, AS. br[=o]m; akin
to LG. bram, D. brem, OHG. br[=a]mo broom, thorn?bush, G.
brombeere blackberry. Cf. Bramble, n.]
1. (Bot.) A plant having twigs suitable for making brooms to
sweep with when bound together; esp., the {Cytisus
scoparius} of Western Europe, which is a low shrub with
long, straight, green, angular branches, minute leaves,
and large yellow flowers.
[1913 Webster]
No gypsy cowered o'er fires of furze and broom.
--Wordsworth.
[1913 Webster]
2. An implement for sweeping floors, etc., commonly made of
the panicles or tops of broom corn, bound together or
attached to a long wooden handle; -- so called because
originally made of the twigs of the broom.
[1913 Webster]
Butcher's broom, a plant (Ruscus aculeatus) of the Smilax
family, used by butchers for brooms to sweep their blocks;
-- called also knee holly. See Cladophyll.
Dyer's broom, a species of mignonette (Reseda luteola),
used for dyeing yellow; dyer's weed; dyer's rocket.
Spanish broom. See under Spanish.
[1913 Webster]