HEL VELLAGE^. 



zm 



immediate result of tliis process of fertilization is tlie bud- 

 ding out and upward gro wtli of a large number of hyphse from 

 beneath the carpogonium 

 {B, Fig. 194) ; these form 

 a dense felted mass, from 

 •which, eventually, there 

 rise vertical, cl o s e -1 y 

 crowded hyphae, which 

 form the hymenium [A, 

 h, Fig. 190). In the ter- 

 minal portions of certain 

 of the vertical hyphse 

 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- 



FiG. 195. 



Fig. 196. 



Fig. 195. — Sexual organs of Peeisa omphalodes. The two spherical carpogonia have 

 «ach a crooked trichogyne, and to each trichngyne is applied the swollen end of the 

 curved antheridium. Much magnitied. — Afier Tulasne. 



Pig. 196.— Pesiaa convexula. ' A, vertical section of the whole plant ; A, hymen- 

 ium ; s, sterile tissue forming a margin, g, and giving off below fine hypliffi which 

 pass into the soil, x 20. B, vertical sectirm of a portion of the hymeninm ; ft to /, 

 asci, with ascospore-* in various stages of development, intermixi-d with slender 

 paraphyses ; fl/i, sub-hymenial hyphse. X 550. — 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. 



