Chaenomeles cathayensis is a species of Japanese Quince . Its flowers can range from pink to white. The fruit is a pear-shaped pome . The fruit is edible but very tough when raw; cooking softens the flesh. They can be use in pies and to make jellies. The fruit is used as an herbal medicine to treat rheumatic pain, nausea and diarrhea . It is cultivated as an ornamental tree and for bonsai .