. Text-book of botany, morphological and physiological. Botany. FIG. 8.—Oogonia and antheridia of Achlya lignicola, growing- on FIG. 9.—Cell in which are produced the wood in water; the course of development is indicated by the letters A—F. swarm-cells or zoogonidia of an Achlya a the antheridium, * its tube penetrating into the oogonium (x 550). (X 55)- A one still closed, B one allowing the zoogonidia to escape ; beneath it a lateral shoot c; a the zoogonidia just es- caped ; b the abandoned membranes of the zoogonidia which have already swarmed; e swarming zoogonidia. (B), and then clothe t
. Text-book of botany, morphological and physiological. Botany. FIG. 8.—Oogonia and antheridia of Achlya lignicola, growing- on FIG. 9.—Cell in which are produced the wood in water; the course of development is indicated by the letters A—F. swarm-cells or zoogonidia of an Achlya a the antheridium, * its tube penetrating into the oogonium (x 550). (X 55)- A one still closed, B one allowing the zoogonidia to escape ; beneath it a lateral shoot c; a the zoogonidia just es- caped ; b the abandoned membranes of the zoogonidia which have already swarmed; e swarming zoogonidia. (B), and then clothe themselves with a delicate membrane, which they abandon (b) when their movement commences (e). 4. Formation of Reproductive Cells by Division of tha Mother-Cell.—In the protoplasm of a cell new nuclei are formed by division; round each of these a portion of the protoplasm collects and becomes rounded off with a greater or less amount of contraction, in order to form a new cell; in this manner the entire proto- plasm of the mother-cell is completely used up; its cell-wall alone remains, if it possess one, which is not always the case. The formation of the spores of Mosses and Vascular Cryptogams, and of the pollen- grains of Phanerogams, always takes place by the division of the mother-cell into four. 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 Sachs, Julius, 1832-1897; Vines, Sydney Howard, 1849-1934. ed. and tr. Oxford, Clarendon press
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectbotany, bookyear1882
