AMERICAN UREDINE.E. 323 



54£\ On Spartina cynosuroides (L. ) Willd., II, Hi., Ames, Iowa, Hume. 



54A. On Spartina cynosuroides (L.) Willd. ii, III., Palco, Kas., Barthol- 

 omew. 



542'. On Spartina cynosuroides (L.) Willd., Ill, Rooks county, Kas., 

 Bartholomew. 



54/'. On Spartina cynosuroides (L.) Willd., Ill, Decorah, Iowa, Holway. 



54/£. On Spartina cynosuroides (L.) Willd., Ill, Ames, Iowa, Hume. 



Orig. Descr. "430. 1. Fraxini Sz. A peridiis in conum badium depres- 

 sum elevatis, demum in lacinias latas fissis. Maculas badias rotundas 

 in foliis subtus prominulas, supra planas, margine fusco cinctas efficit." 

 Schweinitz in Schri/t. d. nat. Ges. zu Leipzig 1 : 66. 



Second Descr. "Uredo peridermiospora, n. s. On Spartina glabra, 

 Ocean Springs, Miss., Tracy, September, 1S89. Epiphyllous, sori lin- 

 ear, near the base of the leaf, long covered by the remains of the rup- 

 tured epidermis; spores bright red, pyriform, echinulate, much thick- 

 ened at the apex, 19-22 by 36-45//; pedicel short but distinct." Ellis 

 and Tracy in Jour. Myc. 6 : 77. 



SYN: 



1822. sEcidium fraxini Schw. Schrift. d. nat. Ges. zu 

 Leipzig 1 : 66. 



1825. CcRoma fraxinatum Link. Linne Sp. PI. 6 2 '.62. 

 1890. Uredo peridermiospora E. & T. Jour. Myc. 6 : 77. 

 1896. Puccinia sparganioides E. & B. Erythea 4:2. 

 1899. Puccinia peridermiospora Arth. Science 10:565. 



O. I. Spermogonia epiphyllous, yellow, inconspicuous, sper- 

 matia obovate or oblong, about 3 by 5«. ^Ecidia hypophyl- 

 lous or on petioles and fruit, in dense rounded groups, usually 

 on swollen and discolored spots; peridia cylindrical, often 

 elongated, margin lacerated; a^cidiospores obovate or ellip- 

 tical, 22-26 by 33—37/^5 contents orange when fresh, becom- 

 ing pale, wall colorless, thin at the sides but greatly thickened 

 at the rounded apex, tuberculate. 



II. III. Sori hypophyllous, amphigenous on some hosts, 

 supercostal, very prominent, large, oblong, elongated on 

 sheaths and culms, ruptured epidermis attached in shreds or 

 disappearing. II. Uredosori pulverulent, at first bright or- 

 ange, becoming yellowish and indistinct; uredospores obovate 

 or elliptical, 22-30 by 33-44/A, contents orange when fresh, 

 becoming pale, wall colorless, thin at the sides but greatly 



