. Morphology of gymnosperms. Gymnosperms; Plant morphology. 386 MORPHOLOGY OF GYMNOSPERMS longest one known among gymnosperms, and it is associated with the deepest pollen chamber. It follows that although the pollen grains. Figs. 433-435.—Ephedra trifurca: development of the archegonium; fig. 433, the neck (») and central cell; Xs°°; fig- 434> three tiers of cells in the neck, the central cell not yet divided; Xsoo; fig. 43s, later stage, in which the neck can scarcely be distinguished from the surrounding cells; the central cell (c) still undivided; X112.— After Land (18). rest upon the n
. Morphology of gymnosperms. Gymnosperms; Plant morphology. 386 MORPHOLOGY OF GYMNOSPERMS longest one known among gymnosperms, and it is associated with the deepest pollen chamber. It follows that although the pollen grains. Figs. 433-435.—Ephedra trifurca: development of the archegonium; fig. 433, the neck (») and central cell; Xs°°; fig- 434> three tiers of cells in the neck, the central cell not yet divided; Xsoo; fig. 43s, later stage, in which the neck can scarcely be distinguished from the surrounding cells; the central cell (c) still undivided; X112.— After Land (18). rest upon the neck of the archegonium, there remains much tissue for the tubes to 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 Coulter, John Merle, 1851-1928; Chamberlain, Charles Joseph, b. 1863; Coulter, John Merle, 1851-1928. Morphology of spermatophytes. Part I. Gymnosperms. Chicago, University of Chicago Press
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