FILAMENTOUS AND BUDDING FUNGI. 



337 



termediate fruit -bearers (sterigmatd), upon which the con- 

 secutive spores are seated. 



2. The Penicillii (Brush-molds). The fruit-bearers, which 

 generally arise vertically from the mycelium, are trans- 

 formed, through manifold forked divisions in their upper 

 third, into dense tufts of brush-shaped, ramifying, delicate 

 processes (basidia), upon whose extremities the conidia are 

 seated in long rows in the form of globules. 



j. The Mucorini (Globular Molds], The fruit-bearers, 

 which are mostly unsegmented and undivided, arise verti- 

 cally from the mycelium and present at their extremity a 

 large spore-mother-cell (sporangium), which is separated 

 from the fruit-hypha by a septum markedly convex upward 



Fig. 72. A, Aspergillus glaucus; B, 

 aspergillus niger ; C, ripe fructiferous 

 head of aspergillus niger throwing off 

 spores. 



ig- 73. Fungi (penicillium glaucum). 



(columella). The sporangium contains within its interior, 

 separated by septa, the large cylindric-oval spores. 



</. The streptothrices form, to a certain degree, a transi- 

 tion between the filamentous fungi and the bacteria. They 

 consist of long, cylindric filaments, dividing by budding, and 

 from which finally a true mycelium is formed. In many of 

 these air-hyphae develop, which simply give off special fruit- 

 heads, spores (segmentation). These streptothrix-spores 

 must not be placed upon the same plane as the permanent 

 forms of the bacteria. In older cultures the streptothrix- 

 threads disintegrate into degenerative products resembling 

 bacteria, like rods, cocci, spirilla ( fragmentation). If these 

 structures are transplanted upon fresh nutrient material, a 



22 



