Oenanthe javanica, commonly Java waterdropwort, water celery, water dropwort, Chinese celery, Indian pennywort and Japanese (flat leaf) parsley, is a plant of the genus Oenanthe originating from East Asia. It has a widespread native distribution in temperate Asia and tropical Asia, and is also native to Queensland, Australia. This plant should not be confused with the plants of the genus Cryptotaenia, sometimes called "Japanese wild parsley" (mitsuba in Japanese), Apium graveolens var. secalinum which is also called "Chinese celery", or other plants called "water dropwort" and "water celery".