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pepper collectively refers to chili peppers, and is used more often to express unprocessed peppers, while chilli is generally used more often to express chili powder, chili sauce, and dried chili peppers. Pepper (Latin name: CapsicumannuumL.) Solanaceae, pepper genus. It is an annual or limited perennial herb. The fruit is usually conical or oblong, green when immature, turning bright red, green or purple when mature, with red being the most common. The fruits of chili peppers have a spicy flavor due to the capsaicin contained in the rind, which enhances the appetite. The content of vitamin C in green peppers is the first among vegetables, native to Mexico, introduced to China in the late Ming Dynasty. There are also ornamental peppers, round, inedible, red, purple and other colors.