Fig. 101. Erysiphales, Family Erysiphaceae. Perithecia with various types of 

 appendages. (A-C) PhyllacHnia eleagni Linder. (A) Perithecial appendage, greatly 

 enlarged. (B) Perithecium with appendages. (C) Ascus with ascospores. (D) Sphaero- 

 theca humuli (DC.) Burr. Perithecia with appendages. (E) Microsphaera herheridis 

 (DC.) Lev. Perithecium with appendages. (F) Uncinula salicis (DC.) Wint. Peri- 

 thecium and appendages. (A-C, courtesy, Linder: Mycologia, 35(4):465-468. D-F, 

 after Tulasne, Selecta Fungorum Carpologia, Paris, Typographic Imp^riale.) 



315 



