156 



ASCOMYCETES. 



Exoascus Rostrupianus Sad. This fungus causes " pockets " 

 on Prunus spinosa (sloe) similar to the preceding species. 

 According to Sadebeck, the asci in this case are more slender. 





Fia. 49. — ExotLscus pruni. Miilforraed 

 Plums — "pocket plums" ; one which is 

 cut shows the rudimentary stoue. 



^ natural size. (v. Tubeuf phot.) 



Fig. 50. — Exoascus pruni on twig of Prunus 

 Padua (at end of July). Four of the ovaries- 

 are malformed, (v. Tuheuf deL) 



Fig. 51. — Exoascus pintni. Young twigs of Plum, showing effects of mycelium. 

 The shoots are swollen and distorted, one diseased leaf remains hypertrophied 

 and much crumpled; on one spur a normal and a "pocket" plum are borne. 

 Specimens from the Museum at Geisenheim. \ nutural size. (v. Tubeuf phot.) 



