. Botany for high schools and colleges. Botany. 208 BOTANY. with a remarkable motility, enabling them not only to change their form, but their place also. When the proto- plasm passes into a condition of rest, it forms itself into small rounded masses, each of which secretes a covering of cellulose about itself. This resting condition may be brought about in two ways : first, through unfavorable conditions, as the absence of the requisite amount of moisture; in such. Fig. 140.—Plasmodium of Ph/ysarum leuwpus {Didymium leucopus of Link), st^ the more granalar central part of the threads, x 350.
. Botany for high schools and colleges. Botany. 208 BOTANY. with a remarkable motility, enabling them not only to change their form, but their place also. When the proto- plasm passes into a condition of rest, it forms itself into small rounded masses, each of which secretes a covering of cellulose about itself. This resting condition may be brought about in two ways : first, through unfavorable conditions, as the absence of the requisite amount of moisture; in such. Fig. 140.—Plasmodium of Ph/ysarum leuwpus {Didymium leucopus of Link), st^ the more granalar central part of the threads, x 350.—After Sachs. case the masses formed are larger, and irregular in size, and constitute the so-called sderotiiim stage ; upon the return of the proper conditions the sclerotia return to the soft and motile condition of the original plasmodium ; the second mode of formation of the resting stage takes place only when the plasmodium has apparently concluded its period of vegetation ; the protoplasm becomes heaped up in a com- pact or even elevated mass, which then separates internally. 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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Keywords: ., bookcentury1900, bookdecade1900, bookpublisher, booksubjectbotany
