PSEUDOPEZIZA 



277 



The disease is favoured by damp soil and a damp atmo- 

 sphere, being most abundant near the wind-shelters formed 

 by scarlet-runners. It is recommended that the use of 

 scarlet-runners be abolished, and that French beans be used 

 instead as wind-screens. 



Oudemans and Koning, Konin. Akad, Wetensch, te Amster- 

 dam, p. 48, June 1903. 



PSEUDOPEZIZA (Fckl.) 



Ascophore erumpent, sessile, glabrous, minute ; asci 

 clavate, 4-8 spored ; spores hyaline, smooth, elongated, con- 

 tinuous or i-septate ; paraphyses present. 



Fig. 81. Pseudopezisa trifolii. i, clover leaf infected ; 2, fungus 

 bursting through epidermis of leaf ; 3, ascus with spores, also two 

 paraphyses. Figs. 2 and 3 mag. 



The ascophores originate in the tissues of the host, usually 

 the leaves. Some are parasites, others saprophytes. Dis- 

 tinguished by the ascophore developing in the tissue of the 

 host, and bursting through to the surface at maturity. 



Clover leaf spot, caused by Pseudopeziza trifolii (Fckl.), 

 is at times very injurious to the clover {Trifolium) and 



