. A manual of botany. Botany. THE VEGETABLE CELL 301 In a few cases, cells are found to contain crystalloids of proteid not included in an aleurone grain. Such bodies occur frequently in certain parts of the tuber of the Potato, and in some Seaweeds. Fats CMid Oils.—Certain cells, generally in the fruit or seed, contain fats or oils saturating the protoplasm, or sometimes occupying nearly the whole of the cell-cavity. Ethereal oils are found similarly in cells of various parts of the leaves or stems, usually in small aggregations of cells in the interior of the tissue, or in cells of the hairs
. A manual of botany. Botany. THE VEGETABLE CELL 301 In a few cases, cells are found to contain crystalloids of proteid not included in an aleurone grain. Such bodies occur frequently in certain parts of the tuber of the Potato, and in some Seaweeds. Fats CMid Oils.—Certain cells, generally in the fruit or seed, contain fats or oils saturating the protoplasm, or sometimes occupying nearly the whole of the cell-cavity. Ethereal oils are found similarly in cells of various parts of the leaves or stems, usually in small aggregations of cells in the interior of the tissue, or in cells of the hairs which grow from the epidermis. These are generally spoken of as oil-glands, or glandular hairs. Besins.—In certain plants, particularly those belonging to the natural order Coniferae, certain aggregations of cells are found Fig. 656. FiCr. 657. Fig. 658. Fig. 669. ^ ^\ J-'iif. 656. Solitary crystals in tlie cells of the bark of the Locust tree. After Uray. Fig. 657. Conglomerate raphides or sphferaphides of the Beet. Fig. 658. Acicular or true raphides of a species of Rumex. Two cells contain raphides, and three of them chlorophyll granules. Fiij. 659. True or acicular raphides of an Arum being discharged tltrough endos- mosc under the influence of water. to contain quantities of peculiar material,. generally termed resin. This material is different in composition in different plants; it may be recognised by staining red with alcoholic tincture of alkannin. It is soluble in alcohol, benzol, and ether, but insoluble in any waterj' fluid. Baphides.—This name is now more generally applied to all inorganic crystals of whatever form which are found in the cells of plants, although the term raphides was originally given to those only that had the form of a needle {Jigs. 658 and 659). Baphides may be found more or less in nearly all orders of plants, and in aU their organs ; generally, however, they are most abundant in the stems of herbaceous plants, in the bark of wo
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