Synonyms for Japonica (same or very similar meaning)
WordNet sense 1 (greenhouse shrub with glossy green leaves and showy fragrant roselike flowers; cultivated in many varieties):
Camellia japonicaWordNet sense 2 (deciduous thorny shrub native to Japan having red blossoms):
Chaenomeles japonica, maule's quinceFrom the ODE community, based on WordNetadd/edit