. Class-book of botany: being outlines of the structure, physiology and classification of plants; with a flora of the United States and Canada. Botany; Plants; Plants. 134 THE TISSUES. 658. The starch of the plant also originates here, in the form of little striated granules of the same composition as cellulose (CS4 HM Cjo). Some 20 such granules appear in the same cell, either loosely or compactly filling it. Starch is nutritive matter, sealed up for pre- servation and future use. 579 QS3 584 585 682. 580 5S1 586 Contents of cells. 579, Cells of Potato containing starch grains. 580, Starch gr
. Class-book of botany: being outlines of the structure, physiology and classification of plants; with a flora of the United States and Canada. Botany; Plants; Plants. 134 THE TISSUES. 658. The starch of the plant also originates here, in the form of little striated granules of the same composition as cellulose (CS4 HM Cjo). Some 20 such granules appear in the same cell, either loosely or compactly filling it. Starch is nutritive matter, sealed up for pre- servation and future use. 579 QS3 584 585 682. 580 5S1 586 Contents of cells. 579, Cells of Potato containing starch grains. 580, Starch grains from the potato ; 581, from the E. Indian Arrow-root. 582, Kaphides, acicular crystals, in a cell of Poly- withes tuberos*. 583, Crystals in a cell of Cactus. 584, Cells from the ]>ul[> of Pear, coated in- ternally ; a longitudinal section ; 585, Transverse section. 586, Starch granules from AV. Indian Arrow-root. 659. Gum, sugar, salts, acids, alkalies, poisons, medicines, whatever is pecu- liar in the properties of each vegetable substance, may also be held in solution in the cell-sap and invisible, unless forming 660. Raphides, little bundles of crystals, acicular or of some other form, seen in the cells of rhubarb, Cactus, Hyacinth. 661. The development op new cells in the plant is the process of its growth. This is accomplished within the pre-existing cells and by the agency of their con- tents. The primordial utricle divides itself into two or more utricles, by septa growing from its sides until they meet. These then acquire the cellulose layer out- side, the cytoblast inside, at the expense of the old cell, which shortly gives place to its new progeny. Thus cells multiply, and by millions on millions build up the fabric of the plant. CHAPTER II. THE TISSUES. 662. One-celled plants. The cell, as heretofore described, is en- dowed with a life within itself. It can imbibe fluids, nourish itself, and reproduce others like itself. It may, therefore, and actually do
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