REPRODUCTION 



187 



of their longitudinal growth begin to twine their free 

 ends in a spiral of four or six turns; the threads of the 

 spiral gradually approach nearer together, until finally 

 they are brought into contact so that the entire end of 

 the filament takes the form of a helix (the ascogonium). 

 There then grow from the lowest part of the helix two 

 or more small branches, which cling closely to the spiral. 

 One of these quickly outstrips the others in growth; 



FIG. 72. Development of Eurotium repens. A, Small part of a mycele with the 

 conidiophore, c, and young ascogones, as; B, the spiral ascogone, as, with the 

 antheridial branch, p; C, the same with the filaments beginning to grow round 

 it to form the wall of the sporocarp; D, a sporocarp seen from without; E, F, 

 young sporocarp in optical longitudinal section; w, parietal cells; /, the filling 

 tissue (pseudoparenchymatous) ; as, the ascogone; G, an ascus; H, an ascospore. 

 (After De Bary). 



its upper extremity reaches the uppermost turn of the 

 helix and fuses with it. The other branch or branches 

 likewise grow upward along the spirals, shoot out new 

 branches and gradually become so interlaced that the 



