Fig. 1. Section through a
grain of Corn.
Four times natural size.
End.—Endosperm. Germination: When corn germinates
Cot.—Cotyledon. the cotyledon acts as a sucker, turning the
Rad.—Radicle. food in the endosperm over to the embryo; it remains enclosed in the grain during germination. The other parts of the embryo soon become visible. The radicle develops into a root and the bud soon displays a number of green leaves. The primary root soon dies and its function is taken by secondary roots, which sprout from the lower parts of the stem. The essential features of this process of germination are characteristic of all grasses.
Root System: Most fodder and pasture grasses are perennial; that is, their underground parts survive from year to year. These surviving parts consist of underground stems, from which roots and overground stems develop. Sometimes they are creeping with long