. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. ASCOMYCETES 241 generally followed later in the season by the development of peri- thecia, which latter may be differentiated in newly developed stroma, or in the stroma which has borne the Tubercularia stage. A longitudinal section of the perithecia in a related fungus is shown in Fig. 103. The wall of the perithecium consists of an interwoven layer of threads having almost a pseudoparenchymatous appearance. The asci develop from the base and sides, converging toward the apex, eac
. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. ASCOMYCETES 241 generally followed later in the season by the development of peri- thecia, which latter may be differentiated in newly developed stroma, or in the stroma which has borne the Tubercularia stage. A longitudinal section of the perithecia in a related fungus is shown in Fig. 103. The wall of the perithecium consists of an interwoven layer of threads having almost a pseudoparenchymatous appearance. The asci develop from the base and sides, converging toward the apex, each ascus being club-shaped, measuring 60-90 X8-12/1, and. Fig. 102. Nectria cinnabarina, Section of Sporodochium, with Young Perithecium. (Photograph by E. J. Durand) containing eight elliptical spores, which at maturity become two- celled by a partition which may divide the spore into two some- what unequal parts. The spores are about 14-16 x 5-7/x. In artificial culture the mycelium develops rapidly, and usually upon almost any of the nutrient media. Upon canes, stems, or other solid media the tuberculiform stroma is readily produced. Both conidia and ascospores germinate readily. In such cultures conidia are produced irregularly upon small branches of the hyphse and sometimes abscised more or less directly from large. 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 Duggar, Benjamin M. (Benjamin Minge), 1872-1956. Boston ; New York : Ginn
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