. Fundamentals of botany. Botany. 404 STRXJCTTJRE AND LIFE HISTORIES through the neck-canal of the archegonium, into the archegonial chamber. FertiHzation, here as always, is completed by the fusion of the sperm and the egg-nuclei (Fig. 301). The behavior of these little sperms in an allied genus, Zamia, is thus described by their discoverer,^ Webber:. Fig. 301.'—Fertilization in Zamia floridana. The male and female nuclei are fusing; h, remains of the cillia of the sperm. (After Webber.) "In removing the nearly mature pollen-tubes the sperm- atozoids are found to be in various stages of
. Fundamentals of botany. Botany. 404 STRXJCTTJRE AND LIFE HISTORIES through the neck-canal of the archegonium, into the archegonial chamber. FertiHzation, here as always, is completed by the fusion of the sperm and the egg-nuclei (Fig. 301). The behavior of these little sperms in an allied genus, Zamia, is thus described by their discoverer,^ Webber:. Fig. 301.'—Fertilization in Zamia floridana. The male and female nuclei are fusing; h, remains of the cillia of the sperm. (After Webber.) "In removing the nearly mature pollen-tubes the sperm- atozoids are found to be in various stages of development, as would be expected. In many cases tubes have been observed, before cutting them off, in which the two sper- matozoids had pulled apart and were swimming free in the protoplasm. In some instances their movement in the pollen-tube, before it is injured, can be observed with the aid of a hand lens. "It is an interesting sight to see the two giant sper- matozoids moving around vigorously in the pollen-tube, ' Sperms were discovered in Cycas by two Japanese botanists, Hiras^ and 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
