. Botany for high schools and colleges. Botany. 60 1 Mg. 46.—Crystals of calcium oxalate. The right-hand portion of the figure shows two raphis-cells of the nhiibarb, with their contained raphides, and one crystal enlarged. On the left is a crys- tal from the beet. Much magnified. alents of water of crystallization ([Ca 0], 0, 0^+ 6 H, 0). They may be simple (Fig. 47) or combined into compound crystals (Kg. 46) ; many of the former are sometimes found imbedded in the sub- stance of the cell-wall of the fibre-cells of certain Gymno- sperms (Fig. ^j 47). Simple crystals oo-J cur also wi
. Botany for high schools and colleges. Botany. 60 1 Mg. 46.—Crystals of calcium oxalate. The right-hand portion of the figure shows two raphis-cells of the nhiibarb, with their contained raphides, and one crystal enlarged. On the left is a crys- tal from the beet. Much magnified. alents of water of crystallization ([Ca 0], 0, 0^+ 6 H, 0). They may be simple (Fig. 47) or combined into compound crystals (Kg. 46) ; many of the former are sometimes found imbedded in the sub- stance of the cell-wall of the fibre-cells of certain Gymno- sperms (Fig. ^j 47). Simple crystals oo-J cur also with- in the cell- cavities of many plants. The c 0 m - pound forms are very Tarious; they almost always occur in cell-cavities, as in the beet (Fig. 46) ; and it not infrequently happens that both simple and compound crystals are found in the same plant, even in contigu- ous cells, as is the case in the onion bulb. 80. — Crystals of calcium carbonate (Ca CO3) occur less frequently than those just described. Their most striking form is that seen in the structures named cys- toliths (Fig. 48). These possess a curious structure ; a club-shaped or stalked out- growth of cellulose projects into the in- terior of a cell, and upon and in this mul- titudes of small crystals are grouped. Other forms of calcium carbonate crys- tals are to be found in plants—, in the Myxomycetes. According to some observers, crystals ^^^T^^.^ of calcium phosphate, calcium sulphate, ™™5i« Sachs, and silica are occasionally to be met with in plants.* * See an article on plant-crystals by Dr. Lancaster in the Qr. Jr. of me. Science, 1863, p. 243 ; also articles by Professor Gulliver in the same journal for 18R4,1866. and 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 Bessey, Charles E. (Charles Edwin), 1845-1
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectbotany, bookyear1885
