. Botany for high schools and colleges. Botany. 66 BOTANY. cell-families; in both cases separate motile cells (zoospores) in a mother- cell arrange themselves in a definite manner, and gradually unite into a family resembling the parent plant (Fig. 49). By the breaking up of the wall of the mother-cell the new family is set free. (ft) In some fungi the cells composing the vegetative threads (hy- phse) unite loosely with one another into a mass. In some cases the union is so slight that the hyphae may be separated with the greatest ease, while iu others it approaches the density and firmness of
. Botany for high schools and colleges. Botany. 66 BOTANY. cell-families; in both cases separate motile cells (zoospores) in a mother- cell arrange themselves in a definite manner, and gradually unite into a family resembling the parent plant (Fig. 49). By the breaking up of the wall of the mother-cell the new family is set free. (ft) In some fungi the cells composing the vegetative threads (hy- phse) unite loosely with one another into a mass. In some cases the union is so slight that the hyphae may be separated with the greatest ease, while iu others it approaches the density and firmness of true tissues (Fig. 50). While the term Cell-Family may be applied to such aggregations of cells, the common one of Spurious Tissue is to be pre- ferred* (c) In the embryo sac of Phanerogams the cells are at first separate;. Fig. 50. — Bhizormrpha subcortlcalis (the compact mvcelinm of a fungns). The wanting. X 100.—After De Baiy. these afterward unite into a mass which cannot be distinguished by any structural character from a true tissue. (See Fig. 33, p. 43.) As, however, the component cells were originally separate, the resulting mass must be classed with the spurious tissues. 94—(3.) Fusions. It frequently happens that the separat- ing walls of contiguous cells are absorbed and their cell- cavities merged into one. In this way long tubes (vessels) * This is the " Tela contexta' of some 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 Bessey, Charles E. (Charles Edwin), 1845-1915. New York : H. Holt
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectbotany, bookyear1885
