. Fungous diseases of plants, with chapters on physiology, culture methods and technique . Fig. 202. PucciNiA graminis. (After Ward)rt, section of barberry leaf showing spermogonia and aecidia; h, aecidium stage, which breaks through the epidermis in somewhat similarmanner. The spermogonium shows a very simple development,resulting by the gradual growth in extent of a small mass of fila-mentous hyphae developing in an intercellular manner just beneath 412 FUNGOUS DISEASES OF PLANTS the upper epidermis. At maturity the flask-shaped body consistsof an indefinite wall, later giving rise to numero
. Fungous diseases of plants, with chapters on physiology, culture methods and technique . Fig. 202. PucciNiA graminis. (After Ward)rt, section of barberry leaf showing spermogonia and aecidia; h, aecidium stage, which breaks through the epidermis in somewhat similarmanner. The spermogonium shows a very simple development,resulting by the gradual growth in extent of a small mass of fila-mentous hyphae developing in an intercellular manner just beneath 412 FUNGOUS DISEASES OF PLANTS the upper epidermis. At maturity the flask-shaped body consistsof an indefinite wall, later giving rise to numerous filamentousbranches within, most of which project inward toward the center,the majority bearing on their tips small rod-shaped or oval filamentous hyphae emerge from the mouth of the pycnidiumas hair-like processes. The hyphae making up the pycnidium areall tinted yellow or orange in color, the coloring matter being firstpresent in the protoplasm and later deposited in the cell spots in which first the pycnidia and later the aecidia are pro-duced are pale yel
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Keywords: ., bookcentury1900, bookdecade1900, bookpublisherbostonnewyorketcgi
