compass plant

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

• noun A perennial herb (Silphium laciniatum) in the composite family, native to prairie regions of North America and having radiate yellow flower heads and erect, basal, pinnately divided leaves.

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

• noun North American annual with red or rose-colored flowers
• noun any of several plants having leaves so arranged on the axis as to indicate the cardinal points of the compass