. Diseases of economic plants . Plant diseases. APPENDIX 487 The mycelium may propa- gate only vegetatively, often forming dense masses (scle- rotia) (Fig. 208), to tide over unfavorable times, or they may produce reproductive cells (spores) having the func- tion of seeds. The forms of spores and the ways in which they are borne are manifold and serve as the chief means of distinguishing one fungus from another. Some are borne in sacs (asci, Fig. 209); others on basidia (Fig. 210). The asci may be in perithecia (Fig. 209), or uncovered. Basidia are often borne upon the surface of the gills of
. Diseases of economic plants . Plant diseases. APPENDIX 487 The mycelium may propa- gate only vegetatively, often forming dense masses (scle- rotia) (Fig. 208), to tide over unfavorable times, or they may produce reproductive cells (spores) having the func- tion of seeds. The forms of spores and the ways in which they are borne are manifold and serve as the chief means of distinguishing one fungus from another. Some are borne in sacs (asci, Fig. 209); others on basidia (Fig. 210). The asci may be in perithecia (Fig. 209), or uncovered. Basidia are often borne upon the surface of the gills of toadstool-like fungi (Fig. 184), or upon the Uning of the pores of similar struc-. FiG. 208. â Sclerotia of lettuce sclerotini- ose, natural aize. Original, ascospore â ascusmW- ^ emcospores w â , ^-^ ' Uigermmofwrr. 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 Stevens, Frank Lincoln, 1871-1934; Hall, John Galentine, 1870-. New York : Macmillan
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Keywords: ., bookauthorstevensf, bookcentury1900, bookdecade1910, bookyear1910
