Kern: Rusts on Cyperus and Eleocharis 147 



pean form of our species. The teliospores differ materially, par- 

 ticularly in thickness of walls. The walls are 2-2.5 il thick 

 whereas all of our species on Cyperus have notably thin walls, 

 none of them having walls more than 1.5 /.t thick and for the most 

 part they are i ft or less. The urediniospores have pores often 

 above the equator, an arrangement not found in any of our 

 species. 



Puccinia conclusa Thiim. in Contr. Flor. Lusit. in Jour. d. sc. 

 math. phys. e nat. Lisboa 24: 10. 1878. From Coimbra, 

 Portugal. 



No specimen has been available ; uredinia are not described. 

 Puccinia subcoronata P. Henn. Hedw. 34: 94. 1895. From 

 ' Goyaz, Brazil. 



Apparently differs from our species in coronate condition of 

 teliospores. Our specimen bearing this label does not appear to 

 be authentic. 



Uredo philippinensis Sydow, Ann. Myc. 4: 32. 1906. 



Has much smaller urediniospores than any of our species. 

 Uredo eleocharidicola Speg. Anal. Mus. Nac. Buenos Aires 6 : 



237. 1899. 



Resembles Puccinia liberta but is not identical. 



Department of Botany, 



The Pennsylvania State College. 



