Rice (Oryza sativa) is a cereal plant of the family Graminaceae or Grasses. It is an important food plant. The culm of the rice is from 30 centimetres to two meters high, annual, erect, simple, round and jointed; the leaves are large, firm and pointed, arising from very long, cylindrical, and finely striated sheaths; the flowers are disposed in a panicle somewhat resembling that of the oat; the seeds are white and rectangular, but vary in size and form in the numerous varieties. Cultivation requires a hot summer with plenty of water.