. The essentials of botany. Botany. Fig. 120.—A cluster of staminate cones or flowers. ^, of a Pine (Pinus sylves- tris), with a detached stamen. Natural size. B, showing the two pollen-sacs. Considerably magnified. may be understood from a study of those of the pines. The pollen-bearing flowers—staminate flowers, as they are. Fig. 121.—Pollen-cells of Glymnospenns. A, of a Cycad; y, rudimentary first stage (prothalimm), one pollen-cell germinating. B, pollen-cells of a Hne, side and top views, showmg bladder-like enlargements of outer cell-wall bl- the rudimentary prothallium is shown here al

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. The essentials of botany. Botany. Fig. 120.—A cluster of staminate cones or flowers. ^, of a Pine (Pinus sylves- tris), with a detached stamen. Natural size. B, showing the two pollen-sacs. Considerably magnified. may be understood from a study of those of the pines. The pollen-bearing flowers—staminate flowers, as they are. Fig. 121.—Pollen-cells of Glymnospenns. A, of a Cycad; y, rudimentary first stage (prothalimm), one pollen-cell germinating. B, pollen-cells of a Hne, side and top views, showmg bladder-like enlargements of outer cell-wall bl- the rudimentary prothallium is shown here also. Much 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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Keywords: ., bookcentury1800, bookdecade1890, bookpublisher, booksubjectbotany