. Embryogenesis in plants. Embryology. Fig. 21. Embryogeny in Equisetiim A, B, E. anense. Young and older embryo, in longitudinal section (after Sade- beck); I-I, first wall of zygote, at right-angles to archegonial neck. C, E. maximum. Germinating spores. D-J, E. debile. Development of embryo; the first or basal wall, b-b, may vary in position from horizontal to vertical and the embryo, which may pass through an almost perfect octant stage, tends to become flattened; the shoot apex, and perhaps the first root are of epibasal origin, the hypobasal cell giving rise to the very large foot; s, sh

. Embryogenesis in plants. Embryology. Fig. 21. Embryogeny in Equisetiim A, B, E. anense. Young and older embryo, in longitudinal section (after Sade- beck); I-I, first wall of zygote, at right-angles to archegonial neck. C, E. maximum. Germinating spores. D-J, E. debile. Development of embryo; the first or basal wall, b-b, may vary in position from horizontal to vertical and the embryo, which may pass through an almost perfect octant stage, tends to become flattened; the shoot apex, and perhaps the first root are of epibasal origin, the hypobasal cell giving rise to the very large foot; s, sh Stock Photo

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. Embryogenesis in plants. Embryology. Fig. 21. Embryogeny in Equisetiim A, B, E. anense. Young and older embryo, in longitudinal section (after Sade- beck); I-I, first wall of zygote, at right-angles to archegonial neck. C, E. maximum. Germinating spores. D-J, E. debile. Development of embryo; the first or basal wall, b-b, may vary in position from horizontal to vertical and the embryo, which may pass through an almost perfect octant stage, tends to become flattened; the shoot apex, and perhaps the first root are of epibasal origin, the hypobasal cell giving rise to the very large foot; s, shoot apex; r, root; Is, first whorl of leaves; /, foot; a, archegonial neck. (D, x 240; E-J, x 270). (C-J, after Campbell).. 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 work.. Wardlaw, C. W. (Claude Wilson), 1901-. London, Methuen; New York, Wiley

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