. Comparative morphology of Fungi. Fungi. SPHAERIALES 269 and germinate in spring, producing conidia of Ramularia Hieracii (Klebahn, 1918). Of Cercosphaerella, M. millegrana on leaves of Tilia cordata, forms conidia of Cercospora microsora and, further, the imperfect form of M. cerasella, a leaf spot of cherry, is Cercospora cerasella (Aderhold, 1900). As has been indicated, the extent of the imperfect forms of Myco- sphaerella is by no means exhausted in the three sections above; , of the forms important in phytopathology, M. pinodes, causing a spot of pods of beans and peas, has Ascochyt
. Comparative morphology of Fungi. Fungi. SPHAERIALES 269 and germinate in spring, producing conidia of Ramularia Hieracii (Klebahn, 1918). Of Cercosphaerella, M. millegrana on leaves of Tilia cordata, forms conidia of Cercospora microsora and, further, the imperfect form of M. cerasella, a leaf spot of cherry, is Cercospora cerasella (Aderhold, 1900). As has been indicated, the extent of the imperfect forms of Myco- sphaerella is by no means exhausted in the three sections above; , of the forms important in phytopathology, M. pinodes, causing a spot of pods of beans and peas, has Ascochyta Pisi (Vaughan, 1916) and Fig. 179.—Sphaerulina intermixta. Its growth forms known as Dematium pullularis. 1. Ascus with mature spores. 2. Ascospores developing sprout mycelium in nutritive solution. 3. Sprout cells. 4. Sprout cells developing in groups. 5. Hypha forming sprout cells. 6. Sprout cells changing to chains of gemmae. (X 350; after Brefcld.) tabifica causing dry heart rot and leaf spot of beets and sugar beets, has Phoma Betae, on the roots, and Phyll osticta tabifica, in the leave as its imperfect forms. In the remaining purely "sphaerial" Mycosphaerellaceae, only four pathogenic genera are discussed: Venturia (ascospores, as in Myco- sphaerella, divided into two equal cells, perithecial hairy, paraphyses present), Guignardia (ascospores divided into two unequal cells), Dilophia and Sphaerulina (ascospores multicellular). Venturia inaequalis causes apple scab; its imperfect form is Fusicladium dendriticum. Guignardia Bidwellii causes black rot of grapes; it forms micro- and macroconidia in. 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 Gäumann, Ernst Albert, 1893-1963; Dodge, Carroll William, 1895-. New York [etc. ] McGraw-Hill Book Company, Inc.
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