(4 J 4) 



are known. A large amount of work for purposes of verification 

 or extension of the range hosts has been done which it is impos- 

 sible to mention here. In a few instances confirmatory cultures 

 are mentioned when they have been the first ones made with 

 American material or when the first cultures were inconclusive. 

 The plan of this table is to indicate, first, the year when the work 

 was performed, and secondly, the species of Gymnosporangium 

 and its host, whenever that can be made out from the original re- 

 port. Sometimes this information is not given directly, but if 

 there is anything which leads to an inference I have included the 

 possible host, using brackets to indicate that it is my insertion. 

 Regarding the names, I have for the most part employed the name 

 used by the original investigator, but for the sake of making it 

 readily comparable I have in most instances inserted parentheti- 

 cally the name applied to that form in this paper. Thirdly, the 

 successful trial host, or hosts, and the aecial name of the resultant 

 form, are given. This latter space is necessarily blank in many 

 instances where the resultant aecial phase was never recognized 

 and named as an independent form. The fourth column contains 

 the name of the investigator and the reference to the original 

 report. In some cases two names are given, separated by a semi- 

 colon, the idea being the same as where this method of citation is 

 used in connection with the publication of a name, i. e., that the 

 first is largely responsible for the work and the second for the 



Gymnosp 





gium and Their Alti 



RNATE Ph 



ASES 



s of Gym 



ospo 



Trial Host 



Inves 



igator 



^tSll" 



e M 



- Species of Roesteli 

 Birnbaum [Pyrus] 



Place o 

 Oersted 



Publica- 

 Bot. Zeit. 







Sorbus aucuparia 



23: 2c 

 Oersted 



I. 1865. 

 Overs. 



"™ 





R. cornuta 



Danske 

 Selsk 

 1866: 

 1866. 



Forh. 

 185-196. 







Weissdorn [Crataegus 



Oersted 



Bot. 







Apfelbaumen [Ma- 



Zeit. 



25: 222. 



