Synonyms for Compass Plant (same or very similar meaning)
WordNet sense 1 (North American annual with red or rose-colored flowers):
prairie bird's-foot trefoil, Lotus americanus, prairie lotus, prairie trefoilWordNet sense 2 (any of several plants having leaves so arranged on the axis as to indicate the cardinal points of the compass):
compass flowerFrom the ODE community, based on WordNetadd/edit