15G 



ASCOMYCETES. 



Exoascus Rostrupianus Sad. This fungus causes " pockets " 

 on J'ri'ni's sjiinosti (sloe) similar to the preceding species. 

 According- to Sadel)eck, the asci in this case are more slender. 



Fio. 49. — Exoascus pruni. Malformed 

 Plums — "pocket plums"; one which is 

 cut shows the rudimentary stone. 



* natural si/.e. (v. Tubeuf phot.) 



Fio. 50. — Exoascus pruni on twig of Pr 

 Padus (at end of July). Four of the ov 

 are malformed, (v. Tubeuf del.) 



Fio. 51. — Exoaxcus prmii. 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. J natural size. (v. Tubeuf phot.) 



