PEZIZA 



253 



largest of the cup-shaped Pezizae, known by the thick, brittle, 

 watery substance, never hairy nor spiny outside. Ludwig 

 has stated that Peziza vesiculosa (Bull.) sometimes becomes a 

 true parasite ; he found it attacking species of Ea/samina, 

 Hyacinthus, Sidalcea, etc. Plants supposed to have been 

 killed by the fungus, when placed under a bell-jar were soon 

 covered with the conidial form of the fungus, first described 

 by Brefeld, who produced this form from germinating asco- 

 spores. The ascospores are clustered and often irregular from 



Fig. 73. Peziza vesiculosa. Group of fungi, nat. size. 



mutual pressure, externally brownish and coarsely granular, 

 disc pale brown, 3-7 cm. across ; asci long, cylindrical ; spores 

 elliptical, hyaline, smooth, 21-24X11-12 /x. 



The conidial form belongs to the form-genus Cephalo- 

 sporium, pure white, sterile hyphae creeping, giving off numerous 

 short lateral branches of about equal length, each tipped by a 

 swollen head covered with elliptical, hyaline, continuous 

 spores, 8-10x3-4 /*. Common on rich soil, manure heaps, 

 rotten leaves, etc. 



Brefeld, O., Unters. Gessammt. Mykol., 9 Heft, p. 333, pi. 

 13, figs. 16-28 (1891). 



Ludwig, Zeitschr. fiir Pflanzenkr., 1895, p. 12. 



