THE FUNGI WHICH CAUSE PLANT DISEASE 233 



Hedgcock >" who recognizes several species as discoloring lumber. 

 C. pilifera (Fr.) Wint." has been described in detail by von 

 Schrenk as the cause of a blue color in pine wood."' 



Cyanospora Heald & Wolf (p. 232) 



Perithecia solitary or in clusters of two or three on stromatic 

 nodules, immersed, horizontal; ostiole lateral, neck short; asci 



Fig. 166. — C. pilifera perl- Fig. 167. — C. albieedrse. Sec- 



theclum, asci and tion of a peritheclum in 



spores. After von its stroma. After Heald and 



Schrenk. Wolf. 



Fig. 168.— C. albicedrse. 

 Upper part of an ascus 

 showing thickened 

 apical wall and coiled 

 spores. After Heald 

 and Wolf. 



slender, lipear, surrounded by a gelatinous matrix, apically thick- 

 ened; spores filiform, multiseptate, hyaline. 

 , A single species. 



C. albicedrse Heald & Wolf. 



Stroma on bark or wood of the host, varying from gray on the 

 bark to black on wood, lenticular, 1-2 mm. long, solitary or clus- 

 tered; perithecia 825-1200 x 260-400 n; asci 700-1100 x 8-10 fi; 

 spores 600-1000 x 3 jtt; paraphyses numerous, continuous, 1 m 

 in diameter. 



The fungus is described in detail by Heald and Wolf "* as caus- 



