THE FUNGI WHICH CAUSE PLANT DISEASE 



269 



crowded, simple, hyaline; conidia oblong to elliptic, straight or 

 curved, basally pointed, 10-20 x 5-7 fi. 



This was first described in conidial form as a Glceosporium by 

 ' Atkinson ^^ on privet as cause of cankers. The fungus was isolated 

 and grown in pure culture. Later perithecia were obtained in 

 the pure cultures.^*'' 



G. piperata (E. & E.) S. & S. 



Perithecia cespitose, thinly membranous, dark-brown, pyriform, 

 hairy; asci ciavate; spores slightly curved, elliptic, 12-18 x 4-6 n. 



Fig. 198. — Diagrammatic section through acervulus of G. rufomaculanB. 

 a, parenchyma, 6, cuticle, c, subhymenial fungous layer, d, comdiophoTes, 

 e, spores, 6, conidiophores and conidia in detail. After Clinton. 



Conidia (= Glceosporium piperatum) on circular or oval spots; 

 acervuh pustular, concentrically arranged, conidia 12-23 x 5-6 /i.'*^ 



The ascigerous stage was grown from pure cultures of the conidia 

 taken from pepper by Miss Stoneman ^" the perithecia appearing 

 about a month after inoculation. Typical conidia were also se- 

 cured from ascospore sowings. 



G. cincta. (B. & C.) S. & S.^^ 



Perithecia 180-280 n, flask-shaped, membranous, cespitose; 

 asci ciavate, truncate or obtuse, 65-70 /*; spores elKptic, curved, 



5-20 X 3 m''' 

 Acervuli erumpent; conidia (=Colletotrichum cinctum) 12-15 x 



