STUDIES OF GLOMERELLA FKOM DIFFERENT HOSTS. 31 



FICUS CARICA L. (FIG). 



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

 Colletotrichum carica Stevens and Hall. 



On April 23 plates were poured with conidia from the fruit of a fig 

 received from Georgia. These plates produced conidia. The gen- 

 eral appearance of the growth was very similar to that of the fungus 

 from other hosts. Subcultures in tubes produced large scattered 

 acervuli. Setae were present but not numerous. No perithecia 

 were found in these cultures. 



On May 29 streak cultures were made on slant agar tubes, using 

 conidia from acervuli on a decaying fig received from Norfolk, Va. 

 On June 4 no acervuli were found, but a few perithecia with asci 

 not quite mature had appeared. Later, mature asci were found in 

 one tube. These asci were slightly shorter and broader than the 

 average. Some of them contained only two or four spores. Normal 

 asci and spores were also present, however. Other tube cultures 

 developed later an abundance of typical perithecia. The asci 

 showed a greater variability in size than usual on other hosts. (See 

 PL II, figs. 29 and 29a.) 



On July 3 cultures were made using conidia from a stem of the fig 

 from Norfolk. An abundance of acervuli were produced in these 

 cultures. Setae were sometimes present and sometimes apparently 

 wanting. Chlamydospores were also found. The conidial form is 

 evidently Colletotrichum carica Stevens and Hall (88), and it can not 

 be distinguished, so far as the descriptions go, from several other 

 species which have been published. This fungus showed no charac- 

 ters, either in culture or on the host, which would serve to distinguish 

 it from forms occurring upon other species of Ficus as well as those on 

 other fruits, especially the apple. This identity is also confirmed by 

 the cross-inoculation experiments with apples and grapes described 

 later. Edgerton (31), who apparently studied the same organism, 

 also states that it does not differ in any way from the form on the apple. 

 As a result of numerous measurements of asci and ascospores, we 

 find the asci range from 53 to 115 by 10.5 to 15 /i. The ascospores 

 vary from 13 to 21 by 5 to 7 /*. 



FICUS ELASTICA KOXB. (RUBBER PLANT). 



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

 Neozimmermannia elasticae (Zimm.) Koord. 



DEVELOPMENT ON LEAVES IN MOIST CHAMBER. 



On January 14 apparently normal healthy leaves were taken from 

 a greenhouse plant, treated as usual, and placed in a sterile moist 

 chamber. On January 20 dark spots began to appear on the leaves. 

 On February 14 the leaves were entirely discolored. No acervuli 



252 



