rattle weed(n = noun.plant) baptisia tinctoria, horsefly weed, indigo broom - much-branched erect herb with bright yellow flowers; distributed from Massachusetts to Florida;
is a kind of false indigo, wild indigo

ague weed, alligator weed, butterfly weed, cancer weed, consumption weed, crazy weed, devil's weed, dill weed, dyer's weed, french weed, ghost weed, horsefly weed, jamestown weed, jimson weed, joe-pye weed, klammath weed, mad-dog weed, orchilla weed, pickerel weed, pineapple weed, polecat weed, rattle, rattle down, rattle off, rattle on, rattlesnake weed, rheumatism weed, scorpion weed, spotted joe-pye weed, stemless golden weed, stinking weed, styptic weed, trumpet weed, turpentine camphor weed, turpentine weed, water rattle, weed, weed killer, weed out