FUNGI 



ASCOMYCETES, USTILAGINALES, 

 UREDINALES 



BY 

 Dame HELEN GWYNNE-VAUGHAN, 



(formerly H. C. I. fraser) 



D.B.E., LL.D., D.Sc, F.L.S. 



professor of botany in the university of LONDON 



AND 



HEAD OF THE DEPARTMENT OF BOTANY, BIRKBECK COLLEGE 



CAMBRIDGE 



AT THE UNIVERSITY PRESS 

 1922 



