316 



XXIII. REPRODUCTION OF FUNGI. 



conjugation of two similar cells, rounds off and enlarges con- 

 siderably, and the two attached, club-like, swollen mycelial 

 threads form the suspensors. 



FIG. 114. A , contact of two branches, and separation of two cells, which will form 

 the zygospore ; B, fusion of the cells, enlargement of the zygospore and of the branches 

 which bear it ; C, ripe zygospore, enclosed in the blackened membrane of the con- 

 jugated cells ; D, zygospore isolated from this outer membrane and upon which we 

 'see one of the rings of attachment ; E, zy^ospores germinating in moist air into a spor- 

 angiferous hypha. (From Van Tieghem's Traite de Botanique, after Brefeld.) 



The formation of zygotes can usually be forced in the months 

 of March and April, if gonidia are sown in fresh, flattened-out 

 horse-dung. The zygotes are ready in from eight to fourteen 



