. Elements of biology; a practical text-book correlating botany, zoology, and human physiology. Biology. SEEDS AND SEEDLINGS 71 coats. There are some dicotyledonous plants that have food stored outside of the embryo. Such a plant is the castor bean.^ Castor Bean. — A section cut vertically through the castor bean discloses a white oily maes directly under the seed coats. This mass is called the endosperm. If it is tested with iodine, it can be proved to contain starch; oil is also present in considerable quantity Within the endosperm lies the embryo, a thin, whitish structure. If the embryo is
. Elements of biology; a practical text-book correlating botany, zoology, and human physiology. Biology. SEEDS AND SEEDLINGS 71 coats. There are some dicotyledonous plants that have food stored outside of the embryo. Such a plant is the castor bean.^ Castor Bean. — A section cut vertically through the castor bean discloses a white oily maes directly under the seed coats. This mass is called the endosperm. If it is tested with iodine, it can be proved to contain starch; oil is also present in considerable quantity Within the endosperm lies the embryo, a thin, whitish structure. If the embryo is carefully removed from the endosperm (see direc- tions in preparation note, page 19, Hunter and Val- entine, Manual),the struc- ture of the embryo can easily be made out. Open a number of soaked seeds of the fol- lowing-named plants, and locate, with the aid of the diagrams, the embryo and the endosperm in each: four o'clock, morning glory, castor bean, maple. Make diagrams for your notebook to show these Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Hunter, George William, 1873-1948. New York, American book company
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