NEW OR NOTEWORTHY RUSTS ON 

 CARDUACEAE 1 



H. S. Jackson 



In connection with a study of the species of Puccinia occurring 

 on Carduaceae, which the writer has been making while preparing 

 the manuscript of this group for the rust portion (Vol. 7) of the 

 North American Flora, a number of undescribed species have come 

 to light and certain interesting situations encountered. 



The original plan to include such material in a series of papers 

 dealing with the species on Carduaceae from all parts of the world 2 

 has not been abandoned, but owing to the difficulty of obtaining 

 material of all the extra-limital species, and the prospect of early 

 publication of the remaining numbers of the rust portion of the 

 North American Flora, it has seemed best to record the following 

 species and notes at this time. 



Puccinia clara nom. nov. 



Puccinia hyalina Jackson, Bot. Gaz. 55 : 298. 1918. Not P. 

 hyalina Dietel, 1905. 



In 19 1 8 the writer used the name Puccinia hyalina for a species 

 on Vernonia scariosa Arn. from Ceylon. The above name is now 

 offered as a substitute, since it has been found that the earlier use 

 of P. hyalina by Dietel (cf. Engl. Bot. Jahrb. 37: 99. 1905) for 

 a Japanese Carex rust had been overlooked. 



Puccinia Tonduziana Speg. Bol. Acad. Nac. Ci. Cordoba 23 : 



184. 1919 



This species was described from material collected by A. Ton- 

 duz, September, 1896, on an unknown arborescent composite, near 

 San Francisco, Costa Rica. 



1 Contribution from the Botanical Department of the Purdue University 

 Agricultural Experiment Station. 



2 Cf. H. S. Jackson, Carduaceous Species of Puccinia. — I. Species occur- 

 ring on the tribe Vernonieae. Bot. Gaz. 55: 289-312. 1918. 



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