. The essentials of botany. Botany. BBTOPHTTA. 185 masses of cells in small cups 4 to 6 millimetres (i inch) in diameter {S and O, Fig. 101). They are in reality hairs (trichomes) whose upper cells have repeatedly divided so as to form flattish masses. When these fall off they grow directly into new plants. 388. The antherids of Liverworts are more or less globu- lar, stalked bodies (Fig. 102, C), usually immersed in little depressions in the plant-body. They are to be regarded as hairs (trichomes) whose end cells have become greatly in-. Fio. 102.—A, a portion of Common Liverwort (Marchantia
. The essentials of botany. Botany. BBTOPHTTA. 185 masses of cells in small cups 4 to 6 millimetres (i inch) in diameter {S and O, Fig. 101). They are in reality hairs (trichomes) whose upper cells have repeatedly divided so as to form flattish masses. When these fall off they grow directly into new plants. 388. The antherids of Liverworts are more or less globu- lar, stalked bodies (Fig. 102, C), usually immersed in little depressions in the plant-body. They are to be regarded as hairs (trichomes) whose end cells have become greatly in-. Fio. 102.—A, a portion of Common Liverwort (Marchantia polymorpha) with two male branches, hu, in which antherids are borne; C, an antherid, magniiied; D, two antherozoids, greatly magnified. creased in number. There is an outer layer of cells sur- rounding a great number of interior thin-walled cells, the sperm-cells, each of which contains an antherozoid. In the Common Liverwort (Marchantia polymorpha) the antherids are produced in the broadly expanded discs of special branches (Fig. 102, A). The antherozoids are spiral threads of protoplasm, each provided with two cilia (Fig. 102, D). 389. The female organ of Liverworts is called an arche-. 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), 1845-1915. New York : H. Holt and company, ;
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