. Comparative morphology and biology of the fungi, mycetozoa and bacteria . Plant morphology; Fungi; Myxomycetes; Bacteriology. 114 DIVISION I.—GENERAL MORPHOLOGY. In compound spores each merispore germinates in the same way as a simple spore or has the power of doing so (see Fig. 59 C). It is not uncommon to see a germ-tube proceeding from almost every merispore, even where they are many in number, as in Pleospora herbarum and Cucurbitaria Labumi. Sometimes certain merispores only germinate as a rule, and if the cells are arranged in a simple row his is usually the case with one or both the t
. Comparative morphology and biology of the fungi, mycetozoa and bacteria . Plant morphology; Fungi; Myxomycetes; Bacteriology. 114 DIVISION I.—GENERAL MORPHOLOGY. In compound spores each merispore germinates in the same way as a simple spore or has the power of doing so (see Fig. 59 C). It is not uncommon to see a germ-tube proceeding from almost every merispore, even where they are many in number, as in Pleospora herbarum and Cucurbitaria Labumi. Sometimes certain merispores only germinate as a rule, and if the cells are arranged in a simple row his is usually the case with one or both the terminal cells of the row, as in Melogramma BuUiardii, Tul., Melanconis, ^ /( Tul.,Aglaosporaprofusa, Not., Exosporium Tiliae and the stylospores of Cucurbitaria macrospora. The merispores which do not germinate gra- dually give up their contents to those which do\ that is, their contents disappear and are replaced by water in pro- portion as the germ-shoots develope. But theirmembranes remain uninjured, suifering no perceptible perforations. The sprout germina- tion occurs in single genera and species, as Saccharomyces "^ Exoascus', Dothidea Ribesia, Fr.*, and some species of Nec- tria', not to speak of certain doubtful forms like Dematium puUulans which will be de- scribed further on. Small pro- cesses with a very narrow base "Sprout, like commencing germ- tubes, from the surface of the spore, then generally assume an elongated or cylindrical form, and finally are abjointed in the manner described above in the case of the sprouting Fungi. A second and third or more sprouts may follow the first from the same point in the spore, till its protoplasm is exhausted. The sprouts may be formed at any point in the spore (Exoascus, Dothidea) or at fixed points, as at the two extremities of the fusiform dimerous compound spore of Nectria inaurata, or on the whole surface of the spore which is thus thickly covered over with sprouts which stand out from. Fig. 59. A Peritcsaria
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