250 



Mycologia 



March 30 and telia May 25. April 28, 18 plants of Verbesina 

 were successfully inoculated with urediniospores from the previous 

 culture, bearing mature uredinia in 14 to 18 days and telia in about 

 2 months. 



In 1919, urediniospores were again obtained from a collection 

 by Dr. Long at East Palm Beach, and the following plants were 

 inoculated: 2 Coreopsis verticillata, 4 C. major, 2 Elephant opus 

 carolinianus, 4 H. decapetalus, 6 H. hirsutus, 3 H. radula, 2 

 Silphium asteriscum, 2 S. integrifolium, 13 Verbesina virginica 

 and 2 Vernonia flaccidifolia. Only the plants of Verbesina were 

 infected, bearing mature uredinia in 14 to 17 days and telia in 

 about 2 months. 



Since the urediniospores of this Coleosporium from Verbesina 

 do not infect plants of species of Coreopsis, Elephantopus, Heli- 

 anthus, Silphium, Solidago and Vernonia, it appears it does not 

 belong to any of the species of Coleosporium attacking these plants, 

 viz., C. inconspicuum, C. helianthi, C. terebinthinaceae, C. soli- 

 daginis and C. carneum, and it is predicted that it has a distinct 

 aecial form not yet collected or known. 



Distribution of the Species 

 Coleosporium helianthi, according to our records, has been collected in the 

 United States as follows : 

 O and I on Pinus : 

 P banksiana: Michigan. 

 P. echinata: Georgia. 



P. virginiana: Maryland, Pennsylvania, North Carolina, South Carolina, 

 Tennessee, Virginia and West Virginia. 

 II and III on Helianthus : 

 H. australis : North Carolina. 



H. decapetalus : Indiana, Maryland, New York, North Carolina, South 

 Carolina, Pennsylvania, Tennessee and Virginia. 



H. divaricatus : District of Columbia, Georgia, North Carolina, Pennsyl- 

 vania, Tennessee and Virginia. 



H. doroconoides : Ohio and Minnesota. 



H. eggertii: Tennessee. 



H. giganteus: Alabama, Mississippi, New York, Pennsylvania and West 

 Virginia. 



H. glaucus : Georgia and Tennessee. 



H. grosseserratus : North Carolina and West Virginia. 



H. microcephalus : Alabama, Georgia, North Carolina, South Carolina, Ten- 

 nessee and Virginia. 



H. occidentalis : Louisiana. 



