Fungi, Ascomycetes, Ustilaginales, Uredinales . Fi 26. Gymnoascus sp.; a. ascocarp, x 26;b. ascus and free ascospores, x 1040. tn] PLECTASCALES 67 In G. candidus ( d) the antheridium and oogonium already differin form at the time of their union, and, in the majority of cases, appear to. Fig. 2j. Gymnoascus Reesii Baran.; a. surface view of conjugating cells;b. the same in longitudinal section; c. a later stage, septate oogoniumgiving rise t hyphae; Gymnoascus candidus Eidam; (/. surface view of conjugating cells; e. same in longitudinal section;all after Dale. Ctenomyces serratus Eidam;
Fungi, Ascomycetes, Ustilaginales, Uredinales . Fi 26. Gymnoascus sp.; a. ascocarp, x 26;b. ascus and free ascospores, x 1040. tn] PLECTASCALES 67 In G. candidus ( d) the antheridium and oogonium already differin form at the time of their union, and, in the majority of cases, appear to. Fig. 2j. Gymnoascus Reesii Baran.; a. surface view of conjugating cells;b. the same in longitudinal section; c. a later stage, septate oogoniumgiving rise t hyphae; Gymnoascus candidus Eidam; (/. surface view of conjugating cells; e. same in longitudinal section;all after Dale. Ctenomyces serratus Eidam; /. surface view of con-jugating cells, X400; after Eidam. arise from different hyphae. As in G. Reesii the antheridium is straight,but the oogonium elongates before fusion and grows spirally around it tillthe apices meet and fuse (fig. 27 e). Afterwards the oogonium undergoesseptation and gives rise to ascogenous hyphae. The sheath of protectivehyphae is very scanty, represented by a few thin-walled filaments. Amauroascus verrucosus forms sexual organs which, in their early stages,closely resemble those of G. Reesii. Two similar multinucleate hyphaegrow up, and later one of them, the oogonium, enlarges considerably; itbranches without septation, and gives rise to ascogenous hyphae whi
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectfungi, bookyear1922
