100 THE FUNGI WHICH CAUSE PLANT DISEASE 



P. dipsaci Tul. on teasel and Scabiosa in Europe and America and 

 P. violacea Berk, on the flowers of species of Scabiosa in Europe 

 are quite distinct from the preceding; P. schachtii Fcl. on beets 

 kills seedlings in Europe. P. linariae Pel. is on digitalis; P. cytisi 



FlQ. 69. — Sporophores in the Zygomycetes. After De Bary, 

 Brefeld, Cunningham, Schroter. 



Rost."'' "^ on species of Cytisus in Europe; P. arborescens (Berk.) 

 de Bary on poppies, especially garden seedlings, in Europe and 

 Asia. 



Species of less importance are: 



P. rubi Rab. on various species of Rubus in Europe and 

 America; P. fragarise R. & C, usually cited as a sjmonym of 

 P. potentillse de Bary, on the strawberry in France and America; 

 P. trichomata Mas."'* "'' the cause of a root rot of Colocasia 



