Kern : Rusts on Cyperus and Eleocharis 



141 



type was determined by P. C. Standley. The specimen was re- 

 ported by Arthur in the Costa Rican Hst of Uredinales as P. 

 canaliculata^ 



5. PucciNiA Cyperi Arth. Bot. Gaz. 16: 226. 1891 

 Dicaeoma Cyperi Kuntze, Rev. Gen. 3^ : 466. 1898. 

 O and L Pycnia and aecia unknown. 



II. Uredinia chiefly hypophyhous, scattered, often very numer- 

 ous, oblong, 0.3-1.5 mm. long, tardily dehiscent by longitudinal 

 slits, somewhat bullate ; urediniospores eUipsoid or obovoid, 18-24 

 by 24-35 /a; wall light cinnamon-brown, 1.5-2 /x thick, moderately 

 and finely echinulate ; the pores equatorial, usually 3, in occasional 

 spores 4 or 2. 



III. Telia chiefly hypophyllous^ in groups 1.6 mm. long, or 

 scattered, individual sori linear 0.1-0.2 mm. in width, with no or 

 only slight development of stroma, somewhat tardily naked, dark 

 chocolate-brown or blackish, pulvinate, ruptured epidermis con- 

 spicuous ; teliospores broadly clavate-oblong, 18-26 by 35-61 /x, 

 rounded or truncate above, narrowed below, slightly constricted 

 at septum; wall chestnut-brown, paler below, about 1-1.5/^ thick, 

 much thicker above, 7-12 /x, smooth ; pedicel shorty tinted. 



On Cyperaceae: 



Cyperus atropurpureus Liebm., Mexico (state). 

 Cyperus Buckleyi Britton, Michoacan. 

 Cyperus Buchii Britton, Kansas. 



Cyperus cayennensis (Lam.) Britton, Cuba; Porto Rico. 

 . Cyperus cylindricus (Ell.) Britton (C Torreyi Britton), 



Alabama, Texas. 

 Cyperus filiculmis Vahl, Connecticut, Delaware, Indiana, 



Kansas, Massachusetts, Nebraska, New York, Oklahoma, 



Texas, West Virginia, Wisconsin. 

 Cyperus flavicomus L., Mexico (state). 

 Cyperus glohosus Aubl. (C. echinatus Wood), Alabama. 

 Cyperus Grayi Torrey, New. York. 

 Cyperus hermaphroditus (Jacq.) Standley, Guatemala. 

 Cyperus Houghtonii Torrey, Wisconsin. 

 Cyperiis lancastriensis Porter, Delaware. 



See Mycologia lo: 129. 1918. 



