Kern : Rusts on Cyperus and Eleocharis 139 



leaf surface; teliospores clavate-oblong, 14-18 by 31-48 acumi- 

 nate, obtuse or rounded above, narrowed below, slightly con- 

 stricted at septum ; the wall golden or light cinnamon-brown, 

 about I /X thick, much thicker above, 6-10 /x; pedicel short, slightly 

 tinted. 



On Cyperaceae : 



Cyperus distans L., Porto Rico. 



Cyperus flavicoimis Michx., Texas. 



Cyperus laevigatus L., Porto Rico. 



Cyperus odoratus L., Cuba ; Porto Rico. 



Cyperus polystachys Rottb., Porto Rico. 



Cyperus radiatus Vahl, Porto Rico. 



Cyperus sphacelatus Rottb., Porto Rico. 



Cyperus surinamensis Rottb., Porto Rico. 

 Type locality : Kamodamura, Tosa, Japan, on Cyperus tageti- 

 formis. 



Distribution : Southeastern Texas and the West Indies. 



When described this species was known in the uredinial stage 

 only. Teliospores have been found since which are of the 2-celled 

 type. The urediniospore-pore arrangement is similar to the pre- 

 ceding species but the thicker walls of the urediniospores which 

 are frequently thicker and lighter at the apex are very distinctive 

 characters. Except for a single specimen from Texas the distri- 

 bution in our range is limited to Porto Rico. 



3. Puccinia antioquiensis Mayor, Mem. Soc. Neuch. 

 Sci. Nat. 5: 473. 1913 



O and L Pycnia and aecia unknown. 



II. Uredinia amphigenous and caulicolous, scattered, small, 

 punctiform or somewhat oblong, long covered by the epidermis ; 

 urediniospores broadly ellipsoid or obovoid, 14-19 by 18-26 /x; 

 the wall nearly colorless or pale yellow, thin, about i ix minutely 

 and sparsely echinulate ; the pores obscure, apparently 3, equa- 

 torial. 



III. Telia caulicolous or hypophyllous, scattered, rounded or 

 slightly elongated, long covered by the epidermis, finally dehiscent 

 and somewhat pulverulent ; teliospores clavate-oblong, 11-16 by 

 35-50 /X, rounded, truncate or somewhat acuminate at apex, at- 

 tenuate at base, slightly or not constricted at septum ; the wall 



ii 



