724 CONNECTICUT EXPERIMENT STATION REPORT, 



may finally crowd it out in many cases. However, on certain light 

 skinned varieties, especially seedlings, it shows in the summer as 

 small spots in the skin having a decidedly pinkish or reddish 

 purple color. We have seen roadside seedlings made very con- 

 spicuous by it in late fall. In storage the color of the spots is 

 darker. So far we have not seen the fungus in fruit on these 

 superficial spots, and ordinarily they do not seem to reach any 

 considerable size, except perhaps when developed further by the 

 presence of the black rot fungus. In one instance we isolated 

 this Cylindrosporium from market quinces, a new host, and we 

 have frequently seen similar spots, showing no fruiting fungus, 

 on quinces before and after picking. 



On our oat juice agar medium the fungus forms a large, yeast- 

 like, pinkish colony with no aerial growth, but producing an 

 abundance of spores. With age it turns a darker color, sometimes 

 black, though in such cases it may be due to the presence of 

 another fungus frequently associated with it, which we have 

 isolated, but whose identity has not yet been determined. 



AZALEA, Rhododendron indicum. 



POCKET CURL, E.vobasidium Vaccinii (Fckl.) Wor. Plate 

 XXXIII b. Galls and hypertrophy caused by this or closely 

 related species are not uncommon in this state on various wild 

 species of the heath family, but this fungus on a cultivated 

 species was called to our attention for the first time in the fall 

 of 1909. Specimens of the above azalea, purchased a few months 

 previously for a private greenhouse, were very badly injured. 

 These plants were apparently infected when purchased, having 

 been grown out of doors in a neighboring state, but did not 

 show the trouble at that time. The disease appeared on the 

 leaves, usually involving the apical part and causing a decided 

 thickening of the tissues. This infected part covered more or 

 less of the leaf, which often became decidedly concavo-convex, 

 as shown in the illustration. The infected tissues were quite 

 sharply marked off from the healthy part, both by their dis- 

 tortion and by their whitish color, being eventually covered by 

 a mealy coating of spores, etc. 



Cultures were made, and a fungus obtained that seems to 

 be a conidial stage of this fungus, though its identity has not 

 been thoroughly established. 



