Elementary botany . Fig. 230. Disappear-ance of contactwalls of anthe-r i d i u m andearpogonium,and fusion ofthe two Fig. 231. Fertilized egc? surroundedby the enveloping threadswhic 1 grow up around 229-231.—Fertilization in sphaerotheca; one of the powdery mildews. (After Harper.) an ascus, a large majority of the ascomyectes have just 8 spores in an 198 MORPHOLOGY. ascus, while some have 4. others 16, and some an indefinite asci in a perithecium are more variable. In some ascomycetes thereis no perithecium. 416. The black fungi.—These are very common on dead lo
Elementary botany . Fig. 230. Disappear-ance of contactwalls of anthe-r i d i u m andearpogonium,and fusion ofthe two Fig. 231. Fertilized egc? surroundedby the enveloping threadswhic 1 grow up around 229-231.—Fertilization in sphaerotheca; one of the powdery mildews. (After Harper.) an ascus, a large majority of the ascomyectes have just 8 spores in an 198 MORPHOLOGY. ascus, while some have 4. others 16, and some an indefinite asci in a perithecium are more variable. In some ascomycetes thereis no perithecium. 416. The black fungi.—These are very common on dead logs, branches,
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