. Morphology of spermatophytes. [Part I. Gymnosperms]. Gymnosperms; Plant morphology. GINKGOALBS 47 the archegonial chamber after the development of the endo- sperm beak is not made clear in Hirase's account, which seems to imply that the way is open to the archegonial chamber. In any event, the sperms reach the chamber, and in it Hirase has. Fio. 34—GinTcgo biloba: A, longitudinal section of the neok of the archegonium, x 160; B, transverse section of the same, x 160; C, archegonium shortly before fertilization, showing ventral canal cell {v) and q^^ nucleus (?i), x 66 ; Z), free nuclei resul
. Morphology of spermatophytes. [Part I. Gymnosperms]. Gymnosperms; Plant morphology. GINKGOALBS 47 the archegonial chamber after the development of the endo- sperm beak is not made clear in Hirase's account, which seems to imply that the way is open to the archegonial chamber. In any event, the sperms reach the chamber, and in it Hirase has. Fio. 34—GinTcgo biloba: A, longitudinal section of the neok of the archegonium, x 160; B, transverse section of the same, x 160; C, archegonium shortly before fertilization, showing ventral canal cell {v) and q^^ nucleus (?i), x 66 ; Z), free nuclei resulting from the first nuclear divisions of the oospore, x 66; ^, later stage, showing the compact tissue of the embryo tilling the oospore, x 66.—After Steasbcegee. observed them swimming. The entrance of sperms into the archegonia follows, and fertilization is effected. The statement has been usual that fertilization does not occur until the ripe ovules have fallen. While this may be true frequently, Hirase found that some seeds, at least, con-. 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. New York, D. Appleton
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