Synonyms for Shell Ginger (same or very similar meaning)
WordNet sense 1 (cultivated for its shining oblong leaves and arching clusters of white flowers with pink shading and crinkled yellow lips with variegated magenta stripes):
shall-flower, shellflower, Alpinia speciosa, Alpinia Zerumbet, Languas speciosaFrom the ODE community, based on WordNetadd/edit