ON THE MORPHOLOGY OF HEMILEIA VASTATRIX. 11 



tion experiments out here. I recognised them at an early date, 

 cultivated them for several months^ and through several gene- 

 rations ; they produce mycelia and forms of fructification and 

 spores, &c., which have nothing to do with Hemileia. Their con- 

 nection with the spores of the latter fungus is not genetic. So 

 with the forms illustrated by Morris ;^ they belong to saprophytic 

 or epiphyllous forms, and can in no way be genetically connected 

 with Heniileia. Of course in such statements I am not resting 

 on the negative evidence that no connection has been traced, 

 but upon the results of actual cultivation of these forms, as 

 well as the successful propagation of Hemileia itself as above 

 described. Ma^ 1st, 1881. 



1 ' Quart. Journ. Mic. Sci.,' April, 1880, Plates X, XI, XHT, and XIV. 



