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THE UREDINE^ AND USTILAGINE^ OF 

 ESSEX : A CONTRIBUTION TO THE FLORA 

 OF THE COUNTY. 



By F. J. CHITTENDEN, Technical Laboratories, Chelmsford. 



SO far as I am aware, the oniy lists of records for Essex of 

 the occurrence of the interesting rust and smut fungi at 

 present published are those by Dr. M. C, Cooke in the Essex 

 Naturalist 1887, pp. 185 et seq., and by Mr. E. D. Marquand 

 in his list of plants collected by the late Mr. E. G. Varenne, 

 M.R.C.S. (E. N., V. 1891, pp. 21-23). 



The following list is compiled (i) from the records got 

 together by Mr. A. W. Heaver, of Maldon, as the result of the 

 work of a class held in that town for the study of these fungi, 

 which he has kindly allowed me to use, (2) from specimens 

 collected by Mr. H. Whitehead, of the Essex Field Club 

 Museum, which he has kindly allowed me to examine, and (3) 

 from specimens in my own herbarium collected either by Mr. 

 E. E. Turner, of Coggeshall, or by myself. 



The nomenclature of Plowright's British Uvedineae has been 

 followed in the list ; the various forms, aecidia, uredo, and 

 teleutospore forms of the same fungus, when such alternating 

 forms occur, being listed under one name. The following list 

 differs in form from the two cited above, in which the different 

 forms are mostly listed under different names, e.g , the three 

 forms of the corn rust, Puccinia gvaminis are given in Dr. Cooke's 

 list under " /Ecidium hevheridis,'" " Uvedo linearis,'' and " Puccinia 

 gvaminis " ; on the other hand, in a few cases more than one 

 fungus is included under one name, e.g , in Mr. Varenne's 

 collection, now in the museum of the Essex Field Club, and 

 which, through the courtesy of Mr. Cole, I have been able to 

 carefully examine, I find specimens of Phragniidium fragariastri, 

 P. tormentillcB and Uredo agrimonice included under the name 

 •' Uredo potentillaruui D.C." These differences in nomenclature 

 have arisen largely through research into the life-histories of the 

 rust fungi, but they make comparison of lists published at 

 various times a somewhat laborious task, and accurate com- 

 parison in the absence of specimens very frequently an absolute 

 impossibility. I have therefore inserted the names used by 



