313 



ful infection, resulting in the formation of uredinia and telia was ob- 

 tained by sowing aeciospores from Pinus taeda on Vernonia crinita, from 

 Florida. These results were confirmed in 1911 by the same author 

 (Mycol. 4:57. 1912), who obtained successful infection on V. gigantea, 

 using aecial material from Mississippi; and again in 1913 and 1914 

 (Mycol. 7:80, 84. 1915), when infection of V. fasciculata was obtained 

 from aecial material on P. taeda and P. pahistris collected in Florida. 



The type of Tubercularia carnea has not been seen, and presumably 

 is not in existence. It seems desirable, if this name is to be retained at 

 all, to restrict its use to the Vernonia combination or, in case it should 

 later be found desirable to unite this species with C. Elephantopodis, for 

 the combined species. Hedgcock & Long (Phytopath. 7:66-67. 1917) 

 record culture work indicating that the two species may be identical. 

 See also Phytopathology 8:321, 325. 1918. 



2. COLEOSPORIUM DELiCATULUM (Arth. & Kern) Hedgcock & Long, Phyto- 

 path. 3:250. 1913. 



Peridermium delicatulum Arth. & Kern, Bull. Torrey Club 33:412. 

 1906. 



On Carduaceae: II, III. 



Euthamia graminifolia (L.) Nutt., Newark, September 1888, 

 F. D. Chester; Clayton, July 24, 1907, (1706); Felton, Sept. 

 5, 1907, (1746); Selbyville, Oct. 4, 1907, (1990). 

 This species until recently has been included with C. Solidaginis. 

 The first suggestion leading to a true understanding of its relationship 

 was made by Clinton in 1912 (Conn. Agr. Exp. Station Report 1912:352. 

 1913) who observed P. delicatulum on Pinus rigida in Connecticut associ- 

 ated in the field with Coleosporium on Solidago graminifolia. He pointed 

 out a morphological correlation between the spore wall markings of the 

 aeciospores and the urediniospores of the two forms but no cultures were 

 attempted. 



Hedgcock and Long in 1913 (1. c.) showed by infection experiments 

 that this form is distinct and is connected genetically with Peridermium 

 delicatulum. Uredinia developed on Euthamia when inoculated with 

 aeciospores of P. delicatulum on Pinus rigida. 



For a record of additional culture work see Phytopathology 8:321. 

 1918. 



