a tall plant (Melanthium virginicum) of the lily family, growing in the E U.S. and having large clusters of white or greenish flowers
See bunchflower in American Heritage Dictionary 4
(bŭnchˈflouˌər)
noun
A perennial herb (Melanthium virginicum) in the lily family, native to the eastern United States and having narrow leaves and a branched cluster of cream-colored or greenish flowers.