198 



MORPHOLOGY. 



ascu^, while some have 4. others 16, and some an indefinite number. 

 The asci in a perithccium arc more variable. In some ascomycetes there 

 is no perithecium. 



416. The black fungi. — These arc very common on dead logs, branches, 







^ .^'-^ 



Fig. j.u^'. 

 EdiVjle Mnrcl. Muruhella csculcnta. The asci, funning hymenium, cover the 

 pitied surface. 



]cavrs, ill ., and may 1)C r<ilk\k'(! in Ihc \V(»i(ls at nlnmst any season. The 

 f)crilhecia uru uften numerous, scattered ur densely crowded as in Roscl- 



