Kern : Rusts on Cyperus and Eleocharis 



145 



gan, Nebraska, New Jersey, New York, Pennsylvania, 



Wisconsin, Manitoba, Quebec. 

 Eupatorium rotundifolitim L., Delaware, Mississippi. 

 Eupatorium serotinum Michx., Louisiana. 

 Eupatorium verhenaefolhtm Michx., Alabama. 



II. Uredinia chiefly culmicolous, scattered, oblong, 0.3-1 mm. 

 long, tardily dehiscent by longitudinal slits, somewhat bullate ; 

 uredinospores broadly ellipsoid or obovoid, 17-24 by 26-40 ; the 

 wall yellowish or light cinnamon-brown, about 1.5 /x thick, rather 

 sparsely and finely echinulate ; the pores equatorial, usually 4, in 

 occasional spores 3 or 5. 



III. Telia chiefly culmicolous, scattered, oblong, 0.5-1.5 mm. 

 long, tardily dehiscent by longitudinal slits, somewhat bullate, 

 blackish-brown; teliospores clavate-oblong, 13-19 by 32-65^1, 

 slightly or not constricted at septum, truncate, rounded, or obtuse 

 above, somewhat narrowed at the base ; the wall light chestnut- 

 brown, paler below, smooth ; about i (x thick, much thicker at 

 apex, 3-7 IX ; pedicel short, tinted. 



On Cyperaceae : 



Eleocharis capitata (L.) R. Br. (Scirpus capitatus L.), Cuba ; 

 Porto Rico. 



Eleocharis intermedia (Muhl.) Schult., Iowa, New York, 

 Pennsylvania. 



Eleocharis obtusa (Willd.) Schult., Indiana, Oklahoma. 



Eleocharis ovata (Roth) R. & S., New York, West Virginia. 



Eleocharis palustris (L.) R. & S. (E. glaucescens Willd., E. 

 palustris glaucescens A. Gray), Indiana, Iowa, Kansas, 

 Michigan, Nebraska, Wisconsin ; Ontario, Quebec. 



Eleocharis tenuis (Willd.) Schult., Maine, Nebraska, New 

 York. 



Eleocharis sp., Texas, Virginia ; Manitoba. 



Type locality : Spirit Lake, Iowa, on Eleocharis intermedia. 



Distribution : Maine and Quebec to Manitoba, south to the Gulf 

 of Mexico, and in Cuba and Porto Rico, with aecia known only 

 from the eastern United States and adjacent parts of Canada. 



Exsiccati: Barth, Fungi Columb. -^J55, ^75P, 4144, 4662; Barth, 

 N. Am. Ured. 338, 840, ^38, 1043, ^^3^: Ellis, N. Am. Fungi 

 1 419; Ellis & Ev., Fungi Columb. 1458, 1802, 2142; Griff., W. 



