. A handbook of cryptogamic botany. Cryptogams. 14 VASCULAR CRYPTOGAMS Flowering Plants this is the product of the action of the contents of the pollen-grain on the protoplasmic embryonic or germinal vesicles ; in the higher Flowerless Plants, of the action of the antherozoid on the oosphere, or protoplasmic contents of the central cell of the archegone. The naked masses of protoplasm known as the germinal vesicles (or perhaps rather that one only which is ultimately fecundated) are therefore un- questionably homologous with the naked mass of protoplasm known as the oosphere. In Vascular Crypt
. A handbook of cryptogamic botany. Cryptogams. 14 VASCULAR CRYPTOGAMS Flowering Plants this is the product of the action of the contents of the pollen-grain on the protoplasmic embryonic or germinal vesicles ; in the higher Flowerless Plants, of the action of the antherozoid on the oosphere, or protoplasmic contents of the central cell of the archegone. The naked masses of protoplasm known as the germinal vesicles (or perhaps rather that one only which is ultimately fecundated) are therefore un- questionably homologous with the naked mass of protoplasm known as the oosphere. In Vascular Cryptogams the central cell which contains the oosphere is a portion of an archegone which is borne on a prothallium resulting from the germination of a spore or of a megaspore, as the case may be. To understand the homologies with the higher Phanerogams we must again have recourse to the intermediate Gymnosperms. In. 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 Bennett, Alfred W. (Alfred William), 1833-1902; Murray, George Robert Milne, 1858-. London, New York, Longmans, Green, and Co.
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