122 



CAEPOASCI. 



Uncinula has appendages with spirally-coiled extremities ; on Salix and Acer. 

 Phyllactin<a has a circle of bristle-like appendages with dilated bases. P. 

 guttata on Corylus, Fraxinus, Fagus, etc. 



Order 2. Perisporiaceae, Moulds and Mildews. A group of 

 Fungi widely distributed and found in all situations. Usually they 

 have a well-developed surface mycelium, and small, round, seldom 

 conspicuous ascocarps, containing ovoid, pulley-like spores. They 

 are partly saprophytic, partly parasitic, in the latter condition 

 having a brown mycelium. 



Eurotium glaucum ( = E. herbariorum, Figs. 109, 110) and E. 

 repens live on dead organic matter, preserved fruits, etc. The 

 conidial forms of both species are known as " Moulds " (Fig. 109), 

 and formerly were described under the name "Asperyillus glaucus" 



o 



FIG. 110. Euvottum glaucum : a longitudinal section of a half.ripe nscocarp, bounded 

 externally by a well-defined layer of cells, enclosing asci in various stages of develop- 

 ment; b a semi- ripe, c nri almost ripe ascus; d and e spores seen from tbe edge and 

 side j /germinating spore twenty-two hours after been sown in plum juice. 



The conidia for some time remain attached to each other in 

 chains (Fig. 109 a) ; they are abstricted from sterigmata arranged 

 radially on the spherical, swollen end of the conidiophore. The 

 small yellow or brownish ascocarps are frequently found in 

 herbaria, especially when the specimens have been insufficiently 

 dried. Euaspergillus futnigatus and others are pathogenic, causing 

 mycosis in warm-blooded animals. 



Penicillium crustaceum (P. glaucum, Figs. Ill, 112) is an ex- 

 ceedingly common "Mould." Its mycelium appears very fre- 

 quently on any organic matter which is permitted to remain 

 untouched, and soon covers it with a dense mass of blue-green 



