. A textbook of botany for colleges and universities ... Botany. Figs. 95-97- — Vauchsria: showing forma- tion (95), escape (96), and germination (97) of zoospore. — After Coulter. Fig. 94. — Vanchcria : a small portion of the filamentous, branching, coenocytic body. germinates directly, producing a new filament (fig. 97). Sexual reproduction. — The structures connected with sexual reproduction are more highly developed than any previously mentioned, for not only is Vau- cheria heterogamous, but it pro- duces special sex organs which are not transformed vegetative cells, but are specifically f
. A textbook of botany for colleges and universities ... Botany. Figs. 95-97- — Vauchsria: showing forma- tion (95), escape (96), and germination (97) of zoospore. — After Coulter. Fig. 94. — Vanchcria : a small portion of the filamentous, branching, coenocytic body. germinates directly, producing a new filament (fig. 97). Sexual reproduction. — The structures connected with sexual reproduction are more highly developed than any previously mentioned, for not only is Vau- cheria heterogamous, but it pro- duces special sex organs which are not transformed vegetative cells, but are specifically for gamete-production from the be- ginning. In one of the species, for example (fig. 99), a special branch is put out from the side of the filament, and a terminal cell is cut off by a wall and en- larges into a more or less globular oogonium, in which a single large egg (oosphere) is formed. This egg at first is multinucleate, but. 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; Barnes, Charles Reid, 1858-1910, joint author; Cowles, Henry Chandler, 1869- joint author. New York, Cincinnati [etc] American book company
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