Replanting was a key step. Man favored non-shattering, determinate growth, larger and more seeds, tolerance to disturbed habitat, and lack of seed dormancy. The major cereal grains are rice, wheat, and corn. The grass plant occur in all parts of the world. They are monocotyledonous plants and differ in many ways from the generalized plant discussed in chapter 1.
Grasses have fibrous roots.
Many branch at the base and produce more or less equal sized stems called tillers. The leaf has a blade and a sheath that surrounds the stem or culm. The regions where the leaves originate are called nodes. See the diagram on pg. Horizontal stems that grow along the ground are called stolons.