. The elements of botany embracing organography, histology, vegetable physiology, systematic botany and economic botany ... together with a complete glossary of botanical terms. Botany. 86 HISTOLOGY AND PHYSIOLOGY. 194), which consist of crystalline elements disposed in a radiate manner. Inuline is abundant in the tubers of Elecampane, common Sunflower, roots of Dandelion, and other Compositce. no. In many plant-cells, particularly in seeds, fixed oils, as Olive, Castor, Linseed, and Palm Oil, are secreted and exist in the form of drops, mingled with the other cell- contents. The essential oil
. The elements of botany embracing organography, histology, vegetable physiology, systematic botany and economic botany ... together with a complete glossary of botanical terms. Botany. 86 HISTOLOGY AND PHYSIOLOGY. 194), which consist of crystalline elements disposed in a radiate manner. Inuline is abundant in the tubers of Elecampane, common Sunflower, roots of Dandelion, and other Compositce. no. In many plant-cells, particularly in seeds, fixed oils, as Olive, Castor, Linseed, and Palm Oil, are secreted and exist in the form of drops, mingled with the other cell- contents. The essential oils and resins are generally the products of special cells. Of the former. Oil of Tur- pentine, Oil of Lemons, Oil of Thyme, represent one class; Camphor, Essence of Cinnamon, etc., a second; and the essential oils in Mustard, Onions, Asafoet- ida, etc., represent a third class. Resius are generally associated with, and dissolved in, the essential oils. They may be sepa- rated by heat, when they take the form of transparent, or translucent, little bodies. Oxalic acid is generally combined with calcium, in the form of crystals. Other 194 vegetable acids are: malic acid, abun- dant in many sour fruits. Apples, Cherries, Strawberries, etc.; tartaric acid occurs in the Grape, unripe berries of Mountain Ash, etc.; citric acid is abundant in the Lime and Lemon, also associated with malic acid in Gooseberries, Cherries, etc.; tannic acid, in the bark and leaves of Oak, Elm, Willow, etc.; quinic acid, nearly related to the last, occurs in Peruvian Bark ( Cinchona). III. Calcic oxalate may occur in cell-walls, or within the cell, either in granules, or in the form of crystals. Of the latter, the needle-shaped forms are called raphides (Fig. 195); they occur in the cavities of parenchymous Fig. 104. Inuline crystals from the roots of the Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appe
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