queen's cup

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A perennial plant (Clintonia uniflora) in the lily family, native to western North American woodlands, having a usually single white flower that produces a blue berry.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun plant with 1 or 2 white starlike flowers on short leafless stalks; Alaska to California and east to Oregon and Montana