. Comparative morphology and biology of the fungi, mycetozoa and bacteria . Plant morphology; Fungi; Myxomycetes; Bacteriology. Fig. 108. Ciavueps purpurea^ TuL A sderotium wbich has given rise to seven stromata. Supper portion of a stroma in median longitudinal section; cp perithecia. C highly magnified perithedum divided through the middle with the surrounding parts; cp orifice, sk cortical tissue, ky inner tissue of the stroma. D ascus isolated; sfi ascospores issuing. After Tulasne from Sachs" Lehrbuch. A natural size. B slighdy, C and D highly magnified. Fig. 109. Ciavicepi purpurea,
. Comparative morphology and biology of the fungi, mycetozoa and bacteria . Plant morphology; Fungi; Myxomycetes; Bacteriology. Fig. 108. Ciavueps purpurea^ TuL A sderotium wbich has given rise to seven stromata. Supper portion of a stroma in median longitudinal section; cp perithecia. C highly magnified perithedum divided through the middle with the surrounding parts; cp orifice, sk cortical tissue, ky inner tissue of the stroma. D ascus isolated; sfi ascospores issuing. After Tulasne from Sachs" Lehrbuch. A natural size. B slighdy, C and D highly magnified. Fig. 109. Ciavicepi purpurea, TuL Ascospores germinating 48 hours after being scattered on water. Magn. 37s times. sclerotium, if it happens to lie on moist ground, usually produces several spherical stalked stromata (Fig. io8 A), the upper spherical portion of which is thickly covered with perithecia sunk half-way beneath the surface (B, C). The ejected cylindrical jiliform ascospores (D) swell in different parts under the influence of moisture, and put out germ-tubes at several points (Fig. 109). If the ascospores of Claviceps have found their way into young flowers of the Gramineae (Secale in artificial cultivations) under conditions favourable to germination, their development begins in the pistil, according to Kiihn's observations, and doubtless after the germ-tubes have penetrated into the pistil, though this has never been directly observed. The young pistil concealed between the paleae is first of all traversed in every direction and enveloped by a luxuriant growth of the hyphae of the Fungus, as has been already described : a white hymenium, Ldveille's Sphacelia, then forms on the whole of the furrowed surface, and from cylindrical sterigmata on it gonidia are abscised (Figs, no, in a). During the formation of Q 2. 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 per
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Keywords: ., bookcentury1800, bookdecade1880, bookpublisheroxfor, bookyear1887
