. Fundamentals of botany. Botany. 270 STRUCTURE AND LIFE HISTORIES (Fig. 185). The cells from this point on, to the forma- tion of the ascus, are diploid, and therefore constitute the sporophytic generation. anth;-. Fig. 195.—^Lilac mildew {Microsphcera Alni). A, perithecium, with appendages; B, perithecium, showing asci (a); C, an ascus, containing ascospores; D, conidiophore {cph), bearing a chain of conidia (conidio- spores, ); E, beginning of fertilization; anih, autheridium; car, carpo- gonium; F, later stage in fertilization; the contents of the antheridium and carpogonium have fused;

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. Fundamentals of botany. Botany. 270 STRUCTURE AND LIFE HISTORIES (Fig. 185). The cells from this point on, to the forma- tion of the ascus, are diploid, and therefore constitute the sporophytic generation. anth;-. Fig. 195.—^Lilac mildew {Microsphcera Alni). A, perithecium, with appendages; B, perithecium, showing asci (a); C, an ascus, containing ascospores; D, conidiophore {cph), bearing a chain of conidia (conidio- spores, ); E, beginning of fertilization; anih, autheridium; car, carpo- gonium; F, later stage in fertilization; the contents of the antheridium and carpogonium have fused; /, fusion of the two nuclei; G, germination of ascospore {); , germ tube. {E and F after R. A. Harper.) 226. Germination.—When an ascospore germinates it develops directly into a mycelium. 263. Life-cycle.—The life-cycle of Microsphcera may be tabulated as follows:. 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 perfectly resemble the original Gager, C. Stuart (Charles Stuart), 1872-1943. Philadelphia, P. Blakiston's son & co.

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Keywords: ., bookauthorgag, bookcentury1900, bookdecade1910, booksubjectbotany