. Annual report of the Agricultural Experiment Station. Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). 176 —. cells of the the sclerotia in from twelve to thirt}' hours, and im- mediately produce basidia and conidia like the summer form, (Fig. 6). As Miss Snow has remarked, "there is a striking re- semblance between the sclerotia bodies bearing conidia and the later stages of the ordinar}^ conidia growths," as seen in Fig. 3. Indeed, during the autumn we have seen all stages be- tween the two; and although we have termed the hyphal, co- nidi a-b
. Annual report of the Agricultural Experiment Station. Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). 176 —. cells of the the sclerotia in from twelve to thirt}' hours, and im- mediately produce basidia and conidia like the summer form, (Fig. 6). As Miss Snow has remarked, "there is a striking re- semblance between the sclerotia bodies bearing conidia and the later stages of the ordinar}^ conidia growths," as seen in Fig. 3. Indeed, during the autumn we have seen all stages be- tween the two; and although we have termed the hyphal, co- nidi a-beaiing filaments of summer, the early or summer stage, never- theless this passes so Fig. 6.—Section of a sclerotium producing uew hj-phal ? .^-i i , • ^ 4^\ ^ filaments and spores ; from a mid-winter experiment. imperceptlDl}' lUtO tnat .seen in Fig. 3, and the latter into the sderoiui7n, or winter coni- dial stage, that the early stage and the sclerotia must be regarded as extreme states of the same phase of life, resulting almost wholly , from climatic conditions. When any fungus forms such sclerotium masses, the purpose is usually protection against cold or dessication ; and this state takes the place of a "resting spore," in the of a parasite, tiding the fungus over to the next growing season of its host. As the sections of the United States where these sclerotia have been noticed and reported as abundant, namely, in , by Professor Trelease, and in Central New York, are in regions of rigorous winters, it would be interesting to know whether they were as abundant in the south. Certainly in this region the .sclerotia one of the im- portant and effective modes of carr>-ing the fungus over the winter. The perithecia, constituting the fourth state mentioned, begin their development in late autumn, but are not mature in our latitude until March or April. They are found about, or occasionally upon tlie white center of a spot
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