Page:Popular Science Monthly Volume 68.djvu/61

Rh ear-like structure is almost enclosed in the leaf sheaths; in the fourth step only the well developed central spike remains, and is entirely enclosed in the leaf sheaths, owing to the shortening of the internodes

below. The last step illustrates a well developed ear, also showing the much shortened internodes below, and the very greatly reduced leaves, which in the highest types of corn completely disappear, leaving only