. Comparative morphology of Fungi. Fungi. 268 COMPARATIVE MORPHOLOGY OF FUNGI To Septorisphaerella belong Mycosphaerella Hippocastani (Carlia Hippocastani), a leaf spot of Aesculus Hippocastanum, and M. sentina, a leaf spot of pear. As imperfect forms besides pycnia with multicellular conidia (Septoria aesculicola), Klebahn (1918) found in culture free falcate conidia similar to Septoria conidia which are cut off laterally on hyphae and also pycnia with very small bacilliform Fig. 178.—Mycosphaerella sentina. 1. Pycnial stage. Septoria pyricola. 2. Part of perithecial wall. 3. P
. Comparative morphology of Fungi. Fungi. 268 COMPARATIVE MORPHOLOGY OF FUNGI To Septorisphaerella belong Mycosphaerella Hippocastani (Carlia Hippocastani), a leaf spot of Aesculus Hippocastanum, and M. sentina, a leaf spot of pear. As imperfect forms besides pycnia with multicellular conidia (Septoria aesculicola), Klebahn (1918) found in culture free falcate conidia similar to Septoria conidia which are cut off laterally on hyphae and also pycnia with very small bacilliform Fig. 178.—Mycosphaerella sentina. 1. Pycnial stage. Septoria pyricola. 2. Part of perithecial wall. 3. Perithecium. 4. Asci with ascospores. (1 X 236; 2, 4 X 550; 3 X 460; after Klebahn, 1908.) Septoria pyricola is the only imperfect form of M. sentina (Fig. 178, 1) (Klebahn, 1908; Laibach, 1920). Of the section Ramularisphaerella, M. Fragariae, M. punctiformis and M. Hieracii are worthy of note. M. Fragariae, a leaf spot of straw- berries, has Ramularia Tulasnei (Schellenberg, 1917). M. punctiformis, a leaf spot of Tilia, forms free conidiophores with catenulate conidia, pycnia and perithecia. M. Hieracii winters over on Hieracium, like M. Fragariae, with small black sclerotia which grow into the rind of the stem. 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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