Rice may vary in genetics, grain length, color, thickness, stickiness, aroma, growing method, and other characteristics, leading to many cultivars.
[3] The two subspecies of Asian rice, indica and japonica, can generally be distinguished by length and stickiness.
[4] Rice can also be divided based on processing type into the two broad categories of brown and white.
The cultivars listed in this article may vary in any number of these characteristics, and most can be eaten whole grain or milled (brown or white).
The Agricultural Training Centre of West Bengal exists to conserve and promote the use of folk rice varieties, including many listed below.