310 



Mycologia 



cies of Aster is apparently distinct from Coleosporium solidaginis. 

 Peridermium montanum Arthur & Kern apparently belongs to a 

 rust on Aster and if so is distinct from Peridermium acicolum 

 Underw. & Earle, the aerial form of Coleosporium solidaginis. 



Investigations in Forest Pathology, 

 Bureau of Plant Industry, 



U. S. Department of Agriculture, 

 Washington, D. C. 



EXPLANATION OF PLATES 

 Plate 22 



Fig. 1. The pycnia and aecia of Coleosporium ribicola on the needles of 

 Pinus edulis (X 2). 



Fig, 2. The pycnia and aecia of Coleosporium ipomoeae on the needles of 



Pinus palustris (X 2). 



Plate 23 



Fig. 1. Aecia of Coleosporium solidaginis on the needles of Pinus pungens 

 (X 2). 



Fig. 2. Aecia of Coleosporium solidaginis on the needles of Pinus taeda 

 (X 2). 



Fig. 3. Aecia of Coleosporium carneum on the needles of Pinus taeda 

 (X 2). 



