666 Arthur : New Species of Uredineae 



Roestelia fimbriata sp. nov. 



Spermogonia epiphyllous, in clusters on orange spots, promi- 

 nent, nearly black. 



Aecidia hypophyllous, in groups on a thickened substratum ; 

 peridia dehiscent into long fibers forming a somewhat curled 

 fringe; spores subglobose, 32-45 /jl in diameter, wall of medium 

 thickness, chestnut-brown, verrucose. 



On leaves of some species of Sor&iis, Elk mountains, Wyoming, 

 August 21, 1 90 1, Leslie Goodding, no. 554. 



