. Foundations of botany. Botany; Botany. 16 FOUNDATIONS OF BOTANY the outer coat by cutting it with a knife. From seeds which have been seated in water at least twenty-four hours peel ofE 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 jmdosperm.^ The name endosperm is applied to food stored in parts of the seed other than the embryo.^' With
. Foundations of botany. Botany; Botany. 16 FOUNDATIONS OF BOTANY the outer coat by cutting it with a knife. From seeds which have been seated in water at least twenty-four hours peel ofE 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 jmdosperm.^ The name endosperm is applied to food stored in parts of the seed other than the embryo.^' 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 ' 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. Fig. 6. — Lengthwise Section of kernels. Grain of Corn. (Magnified about three times.) y, yellow, oily part of endosperm; Remove the thin, tough skin from one of the latter, and notice its transpar- w, white, starchy part of en-, ency. This skin — the bran of unsifted dosperm j p plumule;.«, the ^^j.^ ^^^^ _ ^^^^ ^^^ ^^^^^ Correspond shield (cotyledon), in contact . with the endosperm for absorp- to the testa and inner coat of ordinary tion of food from it; r, the seeds, since the kernel of corn, like all primary root. ^^.j^^^ ^^:^^^ ^^^^ j.^^ ^^^ ^^^ ^^ ^^^ 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. 1 Buckwheat fumialies 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 s
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectbotany, bookyear1901
