. Botany for high schools and colleges. Botany. Fig, 34. — Union of the swarm-spores of Chondrioderma diffor- me. Pars. (Didymmm Libertianum of Bary); a, two swarm- n /tti- spores; b, the same with a wall and becomes a new cell {rig. fused into one; c, three swarm-spores; d, the same a few moments afterward, the two up- per ones fused into one. X 390.—After Cienkow- 149, p. 222). 57.—In Cosmariiim, a genus of the Desmidiaceae, the uniting cells haye well- ^^ developed walls, and as a consequence the process is somewhat different from what it is in the Myxo- mycetes. The cells, which in this ge
. Botany for high schools and colleges. Botany. Fig, 34. — Union of the swarm-spores of Chondrioderma diffor- me. Pars. (Didymmm Libertianum of Bary); a, two swarm- n /tti- spores; b, the same with a wall and becomes a new cell {rig. fused into one; c, three swarm-spores; d, the same a few moments afterward, the two up- per ones fused into one. X 390.—After Cienkow- 149, p. 222). 57.—In Cosmariiim, a genus of the Desmidiaceae, the uniting cells haye well- ^^ developed walls, and as a consequence the process is somewhat different from what it is in the Myxo- mycetes. The cells, which in this genus are two-lobed (Fig. 35), approach each other ; each sends out from its centre a protuberance which meets the other (d) ; the thin w^alls separating the cavities of the protuberances are absorbed, and. Fig. 35.—Cosmariiim 3Teneg7iinu. «, b, c, different views of the mature plants, d, e, and/, three stages in the formation of the new cell; g^ Ji, and z, the after-devel opment of the new cell, x 475.—After Oersted. the united protoplasmic masses form a round ball (e), which soon becomes enclosed in its own proper coatings (/). 58.—The union of cells in Spirogyra is much like that of Cos7narium. Tif^^Q the cells are united into long 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 Edwin, 1845- [from old catalog]. New York, H. Holt and company
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