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Bean lettuce, alias watercress, water field mustard, gazania, resistant lettuce, water mustard, water nasturtium, etc., perennial aquatic herbs. Native to Europe, China, India and Southeast Asia in many areas.

Celery, also known as celery, early celery, parsley, parsley, medicine celery, wild coriander, for the umbelliferae celery genus in the one and two-year-old herbaceous plants. Native to the Mediterranean coast of the marshland, the world has been widely cultivated. China's celery cultivation began in the Han Dynasty, so far there have been more than 2000 years of history. At first only as an ornamental plant planting, later for food, after continuous domestication cultivation, the formation of a slender petiole type celery cultivars, that is, this celery (Chinese celery).