Arthur: Cultures of Uredineae, i 899-191 7 233 



and others at that time had in mind. In many cases the first re- 

 sults have been to increase the number of species. Thus Puc- 

 cinia alternans and P. obliterate, were described as new species as 

 result of cultures, but as the studies proceeded were reduced to 

 synonyms of the long recognized P. Agropyri, together with 

 Aecidium Aquilegiae, A. Clematidis, Puccinia tomipara, P. Pan- 

 iculariae, and some others. But on the whole, as the cultures 

 have largely dealt with heteroecious species, there has been a re- 

 duction in names as the alternate forms were brought together, 

 and sometimes by the recognition as races of forms that were 

 once thought distinct species. 



The nomenclature of the reports has been made as conserva- 

 tive as possible, in order to give them reasonable uniformity. 

 The new generic names proposed by the writer in 1906 at the 

 Vienna Congress scarcely find an echo in them, while on the other 

 hand the terminology for spore-forms, brought out in 1905, was 

 put into use in the second report following, and proved highly 

 serviceable. 



In the various reports of the cultures, and as a result of them, 

 the following thirteen specific names were transferred to other 

 genera: Aecidium magnatum Arth. and A. Silphii Sydow to Ur- 

 omyces, Aecidium Ceanothi Peck, A. Impatientis Schw., A. Ja- 

 mesianum Peck, A. macros porum Peck, A. monoicum Peck, A. 

 Pammelii Trel., A. Phrymae Halst., A. pustulata Curt., A. Sam- 

 buci Schw. to Puccinia, and Puccinia tumidipes Peck and P. 

 V ernoniae Berk. & Curt, to Bullaria. 



Also as the result of the cultures the following sixteen species 

 were described as new : Gymnosporangium corniculans Kern, G. 

 exterum Arth. & Kern, G. trachysorum Kern, and on the author- 

 ity of the writer Puccinia albiperidia, P. alternans, P., Caricis- 

 Asteris, P. Caricis-Erigerontis, P. C aricis-S olidaginis , P. Eato- 

 niae, P. Koeleriae, P. obliterata, P. patruelis, P. universalis, Uro- 

 myces effusus, U. Solidagini-Caricis, and U. Steironematis, but 

 as the result of further studies most of these were subsequently 

 buried in synonymy. 



