. Foundations of botany. Botany; Botany. 264 FOinSTDATIONS OF BOTAKY applied to the cover-glass, rupture the perithecia by gentle grinding between the cover and slide. Note the number and form of the spore-sacs {asci) expelled from each of several perithecia. Examine under a power of about 200 diam- eters and count the number of spores in the asci. Gentle pressure may make them more distinctly visible. Make drawings to illustrate the structural characters observed. THE STUDY OF AGARICUS 316. Occurrence. — The common mushroom, Agaricus campestm, grows in open fields and pastures in the United S
. Foundations of botany. Botany; Botany. 264 FOinSTDATIONS OF BOTAKY applied to the cover-glass, rupture the perithecia by gentle grinding between the cover and slide. Note the number and form of the spore-sacs {asci) expelled from each of several perithecia. Examine under a power of about 200 diam- eters and count the number of spores in the asci. Gentle pressure may make them more distinctly visible. Make drawings to illustrate the structural characters observed. THE STUDY OF AGARICUS 316. Occurrence. — The common mushroom, Agaricus campestm, grows in open fields and pastures in the United States and Europe. It is the mushroom most extensively cultivated for market, and if not found in the field it may be raised from " spawn " (mycelium), put up in the shape of bricks, and sold by seedsmen in the large cities. Those who make a specialty of selling it furnish directions for culture free. A moderately warm cellar or base- ment makes an excellent winter garden for mushrooms. 317. Structure of Mycelium.— Examine some of the spawn, or mycelium, with the magnifying glass and the low power of the microscope, and with a power of 200 diameters or more examine the individual hyphse which compose it. Are the hyphse united in cord-like strands or otherwise, or are they entirely separate ? Look for cross-partitions in the hyphse. Is there any peculiar structure to be found at these places? Are the cross-partitions near together or widely separated?. Fia, 194.—A Mushroom (Agaricus melleus). my, myceliiam; e, o', c", young " buttons "; et, stipe or stalk; r, ring; fl', 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 Bergen, Joseph Y. (Joseph Young), 1851-1917; Eastwood, Alice, 1859-1953. Boston, Ginn & Co.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectbotany, bookyear1901
