MYCOLOGIA 



Vol. II September, 1910 No. 5 



THE WHITENING OF THE MOUNTAIN 

 CEDAR, SABINA SABINOIDES 

 (H.B.K.) SMALL 



F. D. Heald and F. a. Wolf 

 (With Plate 31, Containing 7 Figures) 



Introduction 



During the past two years a diseased condition of the mountain 

 cedar has been made the subject of observation and study. This 

 condition is produced by one of the ascigerous fungi, which, 

 because of its pecuhar structure, we were unable to assign to any 

 described species. For this reason, some of the diseased mate- 

 rial was sent to Professor C. H. Peck for identification. Be- 

 cause of several important structural characters in which it did 

 not agree with previously described forms, he was unable to refer 

 it to any known genus of fungi, stating, however, that its mor- 

 phology most resembled that of Ophioceras. 



Since receiving this information from Professor Peck, the col- 

 lections at the National Museum at Washington and at the New 

 York Botanical Garden have been examined by the senior author, 

 and no previous collections of this fungus have been found. 



General Characters 

 The most prominent symptom which is associated with the 

 presence of this fungus is the occurrence of whitened areas on 

 the trunk and branches of the affected trees. These areas may be 

 small, although most frequently they are quite extensive. These 



[Mycologia for July, 1910 (2: 159-204), was issued July 15, 1910] 



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