Synonyms for Bocconia (same or very similar meaning)
WordNet sense 1 (herb of China and Japan widely cultivated for its plumelike panicles of creamy white flowers):
plume poppy, Macleaya cordataWordNet sense 2 (small Central American tree having loose racemes of purple-tinted green flowers):
Bocconia frutescens, tree celandineFrom the ODE community, based on WordNetadd/edit