42 PARASITES BELONGING TO THE GENUS GLOMERELLA. 



ease is most serious. As has been pointed out elsewhere in this 

 paper, there is evidence to show considerable difference in the virility 

 of different strains of the fungus from different sources in this country, 

 and this fact may explain the difference in destructiveness of the 

 disease in localities where climatic conditions are apparently equally 

 favorable and the disease is present. 



1TAXGIFERA SP. (MAXGOj. 

 GlomereUa cingulata (Stonem. I S. and v. S. 

 On May 6 leaves and stems of mango received from Hallandale. Fla., 



showing acervuli of Gloeosporium, were placed in a moist chamber. 

 On May IS perithecia with immature asci and numerous acervuli 

 were found on the leaves, and many acervuli were also present on the 

 stems. In the absence of mature ascospores there is a possiblity that 

 the peVithecial form associated with the conidia was not Glonierella, 

 but this is not probable. 



On May 29 plates were poured, using conidia from the mango leaves 

 in moist chambers, and later, single germinating conidia were trans- 

 ferred to tubes. These cultures produced an abundance of large 

 acervuli with pink spore masses, and a few seta? were found. The 

 general characters of the growth were as in the forms from other 

 hosts, though the mycelium varied somewhat in quantity and color. 

 Xo perithecia ever occurred in these cultures, though immature peri- 

 thecia developed on the leaves from which the cultures were made. 

 The conidia from a single acervulus in one of these cultures varied 

 from 12 to 25.5 by 3.5 to 6 u. 



Three species of Gloeosporium hare been described from the mango. 

 G. mangae Xoack (61). G. mangiferae Hemi. (46). and G. raciborski 

 Henn. So far as the descriptions go they can not be satisfactorily 

 separated. The extremes in the spore measurements given for these 

 three species are nearly all included within the range of the measure- 

 ments found in the single acervulus just referred to. while setae were 

 present in some acervuli and wanting in others. 



BEARANTA ARUXDIXACEA L. (ARROWROOT). 



GlomertUa cingulata (Stonem. S. and v. S. 



On January 29 a portion of a leaf of this species, showing a small 

 dead area, was taken from a greenhouse plant, treated as usual, and 

 placed in a sterile moist chamber. On February 7 acervuli had 

 developed, and a little later immature perithecia were found. Tube 

 cultures were made by transfer of conidia from the leaf just described. 

 These cultures produced a growth, of the usual appearance of Glo- 

 mereUa. Xumerous acervuli with pinkish masses of conidia were 



