54 PARASITES BELONGING TO THE GENUS GLOMERELLA. 



cultures from the same leaves acervuli and chlamydospores were 

 found, but no perithecia. 



In February leaves of camellia, showing acervuli of Gloeosporium, 

 were received from South Carolina. Cultures were made from the 

 conidia on these leaves. The fungus developed in the usual manner, 

 but produced very few conidia and no distinct acervuli. The 

 mycelium later became dark colored, and finally two perithecial forms 

 were found; one appeared to be Glomerella, while the other produced 

 large brown septate ascospores, indicating that the culture was im- 

 pure. The Glomerella, however, was apparently identical with that 

 on the leaves and presumably originated from the conidia used. The 

 conidia on the host ranged from 13.5 to 18 by 4.5 to 6 fi. Setae were 

 rarely found. The ascospores from perithecia on different leaves 

 varied greatly. On one leaf they ranged from 10.5 to 18 by 6 ft and 

 were only slightly curved or inequilateral. On another leaf they were 

 more distinctly curved and ranged from 15 to 28.5 by 4.5 to 9 /*. 

 (See PI. I, figs. 15 and 15a.) Though the ascospores in this case 

 appear to show a greater range of variation than in some other cases, 

 still there appears to be no good basis for separating this form from 

 that on the orange. 



THEA SINENSIS L. (TEA). 



Glomerella cingulata (Stonem.) S. and v. S. 

 Laestadia camelliae (Cke.) Berl. and Vogl. 

 Colletotrichum camelliae Mass. 



DEVELOPMENT ON LEAVES IN MOIST CHAMBER. 



On December 4 leaves with small dead areas were taken from tea 

 plants in the greenhouse and placed in a sterile moist chamber. 

 Acervuli with setae and perithecia of Glomerella soon appeared on the 

 leaves and many mature asci were found. No paraphyses were seen. 

 An ascus and ascospores are shown in Plate II, figures 16 and 16a. 



On April 29 other leaves showing small discolored areas were placed 

 in moist chamber. Acervuli of Glomerella with pink masses of 

 conidia soon appeared on these, and 10 days later an abundance of 

 mature perithecia were found. These perithecia in most cases 

 showed rather distinct but inconspicuous beaks. Paraphyses were 

 also found in these. 



Attempts made in February and May to obtain the fungus from 

 apparently healthy tea leaves placed in moist chamber were 

 unsuccessful. 



CULTURES. 



Two cultures on sterile corn meal, made by transier of conidia from 

 a tea leaf in a moist chamber, produced a few conidia but no distinct 



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