1902] THE UREDINE^ IN AMERICA 15 



echinulate uredospores, with uncontracted or occasionally cen- 

 trally contracted contents, well distinguish this species from 

 other Spartina rusts {fig. j, m and n). 



5. PucciNiA RUBELLA (Pers.), nom nov. 



SvN.: 1 791. Aecidiiim riibellum Pers. Linn^ Syst. Nat. cur. Gmelin 



2:1473- 



1796. Aecidium Rumicis Hoffm. Bot. Taschenb. 2 : — , 



1803. Uredo Phragmitis Schum. Fl. Saell. 2 : 231. 



1808. Puccinia arundt7tacea Hedw, Lam, and DC, Encycl, 8 : 250. 



18 10. Uredo striola Strauss. Wetter. Annal. 2 : 105. 



1827. Uredo rubella Spreng. in part. Syst. Veg. 4 : 572. 



1876. Puccinia Phragmitis Korn. Hedw. 15 : 179. 



1898, Dicaeoma Phragmitis Kuntze. Rev. Gen. PI. 3 : 470. 



Exsicc: Sydow, Ured., 278^, 576^^^ 679^ 68o^ 779^ 924 ^ 



Seymour and Earle, Econ. Fungi, 70 "^ 



Carleton, Ured. Amer. 36 "^ 



Eriksson, Fungi Par. Scand. Exsicc, i6q^. 



Linhart, Fungi Hungar,, 26" "^ 37^ 



Vize, Fungi Brit, 124^", 161 ^ 



Thuemen, Myc. univ., 630 ^ 



O. I. Spermogonia not observed. Aecidia small, hypo- 

 phjdlous, on purple-red, somewhat swollen spots, in rounded, 

 often circinating groups, peridia white, low, with reflexed, much 

 split border, aecidiospores polygonal, 17-25 /x in diameter, nearly 

 colorless, wall rather thin, finely tuberculate. 



II. III. Sori amphigenous, prominent, oblong, elongated on 

 sheaths and stems, ruptured epidermis inconspicuous. II. 

 Uredosori, brownish-yellow, pulverulent, without paraphyses ; 

 uredospores elliptical or obovate, 19-24 by 27-36 /x, wall 

 thick, golden yellow, tuberculate, pores four, equatorial. III. 

 Teleutosori very prominent, blackish-brown ; teleutospores 

 oblong, rounded or obtuse at both ends, slightly constricted at 

 the septum, 18-24 by 45-64 /x, side walls rather thick, apex a little 

 thickened, pedicel firm, slender, strongly tinted, very long, two 

 to five times the length of the spore. 



The northern United States east of the Rocky mountains, 

 and Europe. Early stages on several species of Rumex, not yet 

 collected in America, but cultivated from American teleuto- 



*T?, 



