. Embryogenesis in plants. Embryology. PCQ, Fig. 63 A, B, Grerillea robusta (Proteaceae). A, Two-celled embryo surrounded by endo- sperm. B, A later stage; the embryo is now spherical; there is no suspensor (A, X 300; B, X 225; after Brough). C-F, Embryos of Leguminosae. C, Rothia tri- foliata. D, Sesbania aegyptiaca. E, S. graiidiflora. F, Vigna catjang (C, D, F, X 187; E, X 133; after Rau). bilobed distally, the plumule and two cotyledons become organised, and a root primordium is differentiated. The two cotyledons tend to be unequal in size, in width, the larger one, though single a
. Embryogenesis in plants. Embryology. PCQ, Fig. 63 A, B, Grerillea robusta (Proteaceae). A, Two-celled embryo surrounded by endo- sperm. B, A later stage; the embryo is now spherical; there is no suspensor (A, X 300; B, X 225; after Brough). C-F, Embryos of Leguminosae. C, Rothia tri- foliata. D, Sesbania aegyptiaca. E, S. graiidiflora. F, Vigna catjang (C, D, F, X 187; E, X 133; after Rau). bilobed distally, the plumule and two cotyledons become organised, and a root primordium is differentiated. The two cotyledons tend to be unequal in size, in width, the larger one, though single at its point of conjunction with the hypocotyl, becoming two-lobed distally. In fact, there is what appears to be a nascent but unrealised tricotyledonous condition; this may be correlated with the general massive basis of the embryonic development. According to Compton (1913), polycotyle- dony is very rare in angiosperms, many of the reputed examples being. 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 Wardlaw, C. W. (Claude Wilson), 1901-. London, Methuen; New York, Wiley
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Keywords: ., bookcentury1900, bookcollectionbiodiversi, booksubjectembryology
