MILDEWS AND RELATED FUNGI 



159 



shield-shaped, unappendaged, black, membranous to carbonous 

 formed of radiating chains of cells. The asci are four- to eight-spored , 

 short and associated with paraphyses. Two fungi which attack the 

 coffee plant are the most important pathogenic spedes of the family: 



Fig. 55. — A—D, Nectria cinnubarina. A, Stroma of conidia and fruit-bodies of 

 fungus; B, stroma in section; C ascus; D, mycelium "with conidiospores; £. F, Nectria 

 ditissima; F, conidia layer; G, H. Nectria sinaptica; G, ascus; H, pycnidia-like layer. 

 J, Nectria inaurita; K, Nectria or&pensoides coremium. {See Die natHrlichtn Fflanz- 

 enJamUien I. i, p. 3S7-) 



Scolecopellis aeruginea and Microthyrium cofa. There are twenty- 

 one genera, and more than 300 species not well understood. 



Suborder E. Pyrenomjrcetiiiuee. — The myceUum is always present 

 in these fungi. The perithecia are either located upon the substratum. 



