. Comparative morphology and biology of the fungi, mycetozoa and bacteria . Plant morphology; Fungi; Myxomycetes; Bacteriology. CHAPTER V.—COMPARATIVE REVIEW.—ASCOMYCETES.—EVROTIUM. 203 divides by transverse walls into a row of several cells, from which a number of broadly club-shaped erect asci are formed by each cell of the row growing out directly into an ascus, or putting out a few short branches which terminate in asci and are therefore ascogenous. In both Erysiphe and Podosphaera the formation of the envelope is at first in advance of that of the asci, and is nearly finished when the asc
. Comparative morphology and biology of the fungi, mycetozoa and bacteria . Plant morphology; Fungi; Myxomycetes; Bacteriology. CHAPTER V.—COMPARATIVE REVIEW.—ASCOMYCETES.—EVROTIUM. 203 divides by transverse walls into a row of several cells, from which a number of broadly club-shaped erect asci are formed by each cell of the row growing out directly into an ascus, or putting out a few short branches which terminate in asci and are therefore ascogenous. In both Erysiphe and Podosphaera the formation of the envelope is at first in advance of that of the asci, and is nearly finished when the asci or the cells which produce them are still quite small, and it is not till the last stage of the development that the growth of the asci advances, chiefly at the expense of the tissue immediately. Fig. 94. Eurotium refens. ^ branch of the mycelium with a gonidiophorec and young archicarps or: j^sterig- mata. ^spirally twisted arcbicarpoj with the antheridial-branch/and an envelope-branch. C older specimen with a larger number of envelope-branches growing round the archicarp; f antheridial brcuich. D young sporocarps seen from without £ and ^ other yoimg sporocarps in optical longitudinal section. Inf the inner wall isbeginningtobeformed; w the outer wall, y the inner wall-cells and the cells filling the space between the ascogonium and the walL as the ascogonium. G ascus with spores. Hti^ascospoiGoiE. AspergiUuS£lattcus\so]aX&d. .<4 magn. 190 times, the rest of the figures 600 times. surrounding it. The spores are in most cases formed as soon as the asci have reached their full size; but in some species, as Erysiphe Galeopsidis and E. graminis, (WolfiF), there is a pause in the development before the formation of the spores, and further progress only takes place imder favourable conditions of temperature and moistiu-e after a resting period of some duration which happens to fall in the winter- time ; the protoplasm of the tissue of the inner wall is evidently em
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