cupflower

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

• noun Any of various South American plants of the genus Nierembergia of the nightshade family, cultivated as annual bedding plants for their showy purple or sometimes white flowers.

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

• noun Mexican evergreen climbing plant having large solitary funnel-shaped fragrant yellow flowers with purple-brown ridges in the throat
• noun any of various plants of the genus Nierembergia having upturned bell-shaped flowers