HML VELLAOEM. 



287 



immediate result of this process of fertilization is the bud- 

 ding out and upward growth of a large number of hyphse from 

 beneath the carpogonium 

 {B, Fig. 104) ; these form 

 a dense felted mass, from 

 which, eventually, there 

 rise Tertical, closely 

 crowded hyphaB, which 

 form the hymenium {A, 

 h, Fig. 196). In the ter- 

 minal portions of certain 

 of the Tertical hyphae 

 the protoplasm condenses 

 around certain points, and 

 thus gives rise to asco- 

 spores {B, a to /, Fig. 

 196). In this genus {Pe- 

 ziza), as well as most 

 others of this order, the 

 ascospores are always eight 

 in each ascus. At matur- 



FlG. 195. 



FIB. 196. 



Fig. 195.— Sexual organs of Peaai omphalodea. The two spherical carpogonia have 

 each a crooked trichogyne, and to ewch trichogyne Is applied the swollen end of the 

 curved antheridium. Much magnified. — After Tulaene. 



Fig. 196. — Ptzisa conveamla. A, vertical section of the whole plant ; A, hymen- 

 ium ; 5, sterile tissue forming a margin, f/, and giving off below fine hyphffi which 

 pass into the soil. X 20. B, vertical section of a portion of the hymenium ; a to /, 

 asci, with {iBCOspores in various etages of development, intermixed with slender 

 paraphyses ; ah, sub-hymenia] hyphse. X 560.— After Sachs. 



ity the ascospores escape by the rupture of the walls of the 

 asci, this generally taking place at the upper or free end. 



