The Complete Handbook of Rice

Chapter 1: Understanding Rice

The Plant and the Grain

Rice is the seed of a grass, Oryza sativa, that has been domesticated for more than ten thousand years. It is a semiaquatic crop: it tolerates being grown in standing water in a way that wheat, corn, and barley cannot. That single biological fact explains why rice became the foundation of civilization across Asia, from the deltas of the Mekong to the terraces of Bali. The plant itself is not exotic. It grows to roughly a meter in height, has long slender leaves, and bears a panicle of flowers that mature into grain. What matters for the buyer is not the plant, but two parts of the seed: the hull and the caryopsis. The hull is the tough, inedible outer shell. The caryopsis is the edible kernel, and it is the part you actually purchase, cook, and eat.

The caryopsis is not a uniform lump of starch. It is a structured tissue composed of several distinct layers. The outermost layer, the bran, is a thin brown coating rich in oils, fiber, and vitamins. Beneath the bran lies the endosperm, which is roughly 90 percent starch by dry weight and is nearly pure fuel for the plant. At the base of the grain sits the germ, the embryo that would sprout into a new plant. When a miller processes rough rice, the first step removes the hull, producing what is called brown rice: the caryopsis still intact, complete with bran and