Rice (Oryza sativa) is a long panicled grass, having, when ripe, some resemblance to oats, the seed growing in a separate pedicel starting from the main stalk. Each kernel terminates in an awn, and is enclosed in a rough husk, or scale, of a yellowish color. The stem or stalk of rice is similiar to that of wheat, except that the joints are more numerous. It is annual, and rises to the height of from two to six feet, according to the variety, soil, and culture. The rice seed is surrounded with a husk, which is so closely attached to it as being difficult of seperation. It is cleaned by passing through mill-stones, set far enough apart to prevent crushing the grain, but sufficiently near to remove the husks or chaff by friction.