scarlet runner

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

• noun A climbing tropical American bean plant (Phaseolus coccineus), cultivated for its scarlet flowers and edible pods and seeds.

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

• noun hairy trailing or prostrate western Australian vine with bright scarlet-pink flowers
• noun tropical American bean with red flowers and mottled black beans similar to Phaseolus vulgaris but perennial; a preferred food bean in Great Britain
• noun long bean pods usually sliced into half-inch lengths; a favorite in Britain