"You know, Norah, when we were talking about starch, I made some to show you," said Fred. "I made it from some flour, and flour is made from wheat. Here are some grains of wheat. Do you know where they come from?""They grew on plants in a corn field." said Norah. "Well, now," said Fred, "we are goingto have a talk about these corn plants. Teacher told us we could understand the corn plants by looking at the stems of some tall grass. So Will and I have been hunting about to find some grass that would do. We have found some. Suppose we have a look at it.
"We will begin with the leaves. They are long, narrow, and pointed, and not like most of the leaves we see. We call them blades of grass. If we hold them up to the light, we see that the veins run side by side, from one end of theleaf to the other. The veins are parallel.
"Look! There is a swelling or knot in the stem, where each leaf joins it. The leaves all spring from these knots or joints.
"Now let us split open the stem with this knife. You see it is hollow.""But," said Norah, "I can"t see what all this has to do with the corn plants.""Well," said Fred, "the corn plants are just like this grass. They are grasses. We call them the corn- grasses.