. Botany for high schools. Botany. 370 GENERAL MORPHOLOGY OF PLANTS nucellus which is filled with a fluid and lies next the egg cases in the female prothallium (endosperm). The central cell (or stalk. Fig. 369. A, section of ovule of zamia, partly diagrammatic, showing germinating pollen tubf entering the nucellar cap. M, micropyle; O, outer portion of ovule (exocarp); /, im stony portion of ovule (endocarp); PC, pollen chamber; A^, nucellar cap; P, endosperm (p thallium); /l,archegonium (pollen grains in pollen chamber are germinating, the pollen tub growing in the tissue of the nucellar cap)
. Botany for high schools. Botany. 370 GENERAL MORPHOLOGY OF PLANTS nucellus which is filled with a fluid and lies next the egg cases in the female prothallium (endosperm). The central cell (or stalk. Fig. 369. A, section of ovule of zamia, partly diagrammatic, showing germinating pollen tubf entering the nucellar cap. M, micropyle; O, outer portion of ovule (exocarp); /, im stony portion of ovule (endocarp); PC, pollen chamber; A^, nucellar cap; P, endosperm (p thallium); /l,archegonium (pollen grains in pollen chamber are germinating, the pollen tub growing in the tissue of the nucellar cap). B, same a little later, showing basal end of the pollen tubes bending downward as the sperm cells in that end are developing. cell sometimes called) has divided, as in pines, into a sterile cell and a generative cell (body cell) which now divides into the two sperm cells,* which are oval in form, and each has a spiral band of numerous cilia around the smaller end (fig. 373). Some of. 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 Atkinson, George Francis, 1854-1918. New York, H. Holt and Company
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1910
