. Foundations of Botany. Botany. 16 FOUNDATIONS OF BOTANY -P the outer coat by cutting it with a knife. From seeds which have been soaked in water at least twenty-four hours peel off the coatings and sketch the kernel. Make a cross-section of one of the soaked seeds which has not been stripped of its coatings, and sketch the sec- tion as seen with the magnifying glass, to show the parts, especially the two cotyledons, lying in close contact and encircling the white, starchy-looking The name endosperm is applied to food stored in parts of the seed other than the With a moun
. Foundations of Botany. Botany. 16 FOUNDATIONS OF BOTANY -P the outer coat by cutting it with a knife. From seeds which have been soaked in water at least twenty-four hours peel off the coatings and sketch the kernel. Make a cross-section of one of the soaked seeds which has not been stripped of its coatings, and sketch the sec- tion as seen with the magnifying glass, to show the parts, especially the two cotyledons, lying in close contact and encircling the white, starchy-looking The name endosperm is applied to food stored in parts of the seed other than the With a mounted needle pick out the little almost spherical mass of endosperm from inside the cotyledons of a seed which has been deprived of its coats, and sketch the embryo, noting how it is curved so as to enclose the endosperm almost completely. 19. Examination of the Kernel of In- dian Corn. — Soak some grains of large yellow field corn 8 for about three days. Sketch an unsoaked kernel, so as to show the grooved side, where the germ lies. Observe how this groove has be- come partially filled up in the soaked kernels. Remove the thin, tough skin from one of the latter, and notice its transpar- ency. This skin — the bran of unsifted corn meal — does not exactly correspond to the testa and inner coat of ordinary seeds, since the kernel of corn, like all other grains (and like the seed of the four-o'clock), represents not merely the seed, but also the seed-vessel in which it was formed and grew, and is therefore a fruit. i Buckwheat furnishes another excellent study in seeds with endosperm. Like that of the four-o'clock, it is, strictly speaking, a fruit; so also is a grain of corn. 2 In the squash seed the green layer which covered the embryo represents the remains of the endosperm. 3 The varieties with long, flat kernels, raised in the Middle and Southern States under the name of " dent corn," are the Fig. 6. — Lengthwise Section of Grain of Corn. (Magnified abo
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