UROPHLYCTIS 



93 



piriform, terminal or intercalary, 15-50 /x diam. Zoospores 

 angular, then globose, i-ciliate, becoming clothed with a 

 membrane, about 3 /x diam. 



Prunet, Cinnp. Rend., 119, p. 108 (1894). 



UROPHLYCTIS (Schrot.) 



Zoosporangia sessile on the living host, with filamentous 

 mycelium penetrating the tissues. Thick-walled resting-spores 

 resulting from the conjugation of two cells are formed in the 

 tissues of the host. 



Crown-gall of lucerne. This is produced by Urophlyctis 

 alfalfae (Magn.), and was first observed in this country by Mr. 



Fig. 18. Urophlyctis alfalfae. Nodules on root 

 and collar of lucerne plant, formed by the fungus. 

 (After Salmon.) 



Salmon, who gives the following account of the epidemic : 

 'The following inoculation experiments were carried out to 

 demonstrate that the resting-spores, on being set free from the 



