ASCOMYCETES 



36: 



the'traces may be seen, and by the time of maturity even the ascus-walls 

 disappear and the perithece contains little but ripe ascospores. 



"When the ascospore germinates it produces a mycele, on which there 

 shortly arise upright sporophores v;ith round swollen apices bearing 

 numerous short sterigmata over the surface. On the sterigmata chains 

 of acrospores are formed successively, which, proceeding radially from the 



a-j-.. 



Fig. 304. — Etirotuan repens de Bj^. A, branch of mycele with sporophore, c, and sterigmata, st : 

 early stage of carpogone at as. B : spirally twisted carpogone, as, antherid, p, and an envelope- 

 hj-pha. C, older state with more envelope-hyph^e. D, young sporocarp. E and F, young spo- 

 rocarps in optical longitudinal section. In E the inner wall is beginning to be formed ; iv, the 

 outer wall ; f, the nner wall and other cells filling space between it and carpogone. G, ascus with 

 spores. H . ascospore of ^. Jierbariorian Lk. (^A x 190, the others x 600.) (After de Barj'.) 



apex of the sporophore, surround it with a globular mass of acrospores. 

 The course of development is the same here as in the Er}-sipheas, and 

 generation after generation of acrospores is usually formed in succession 

 without the myceles attaining to the formation again of the sporocarp — 

 this being the result of the external conditions of life of the fungus. 



