JHOI KHOI Brassica rapa subsp . chinensis, is a variety of plant of the Family Brassicaceae, of the type known as bok choy or pak choi, is one of the varieties of Chinese cabbage. These chinensis do not form heads and have green, smooth and dark leaves, such as spinach or chard, but with a strong white stem, forming a bouquet reminiscent of celery or moztaza. It reaches up to about 50 cms. They are popular in southern and southeastern China. In Chile and Peru we call it Pak choi and in the United States bok choi is also used.