. Fundamentals of botany. Botany. 422 STRUCTURE AND LIFE HISTORIES duced, consisting usually, in the white pine, of only four cells, all in the same plane; the number of these cells is somewhat variable. No neck-canal cells are formed; only the egg, and the ventral canal-cell (the sister-cell of the egg) which disorganizes early (Fig. 312).. Fig. 312.—White pine [Pinus Strobus). Vertical section through the upper part of an ovule, shortly before fertilization, , sperm-nuclei; , stalk-cell; , tube-nucleus; arch, archegonium; , egg-nucleus. (After Margaret C. Ferguson.) 374. Male Ga
. Fundamentals of botany. Botany. 422 STRUCTURE AND LIFE HISTORIES duced, consisting usually, in the white pine, of only four cells, all in the same plane; the number of these cells is somewhat variable. No neck-canal cells are formed; only the egg, and the ventral canal-cell (the sister-cell of the egg) which disorganizes early (Fig. 312).. Fig. 312.—White pine [Pinus Strobus). Vertical section through the upper part of an ovule, shortly before fertilization, , sperm-nuclei; , stalk-cell; , tube-nucleus; arch, archegonium; , egg-nucleus. (After Margaret C. Ferguson.) 374. Male Gametophjrte.—The germination of the microspore consists chiefly of a series of cell-divisions, all within the wall of the microspore. The first three divisions result in the formation of four cells, namely, two prothallial cells, one mother-cell of the antheridium, and a. 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 Gager, C. Stuart (Charles Stuart), 1872-1943. Philadelphia, P. Blakiston's son & co.
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Keywords: ., bookauthorgag, bookcentury1900, bookdecade1910, booksubjectbotany
