214 



Mycologia 



On Carex lacustris, verrucosa. 



Distribution : Known only from separated localities, Ontario, 

 Wisconsin, Iowa, and Alabama. 



The name minuta was applied by Dietel to a specimen collected 

 at Auburn, Alabama, on C. verrucosa, the striking characters of 

 which are the moderately large urediniospores and the very small 

 teliospores. Puccinia riparia as described by Holway possessed 

 these same characters and his specimens agree well with Dietel's 

 material. Mr. Holway thought that the telial form which he de- 

 cribed was associated with an aecidium on Ribes floridum but 

 repeated attempts to infect Ribes with these spores from C. 

 riparia have failed (Bot. Gaz. 35:22, 1903, Jour. Myc. 14:14, 

 1908). Infection has been secured from C. riparia on Urtica 

 but the spores are quite different from those included here. From 

 these results it is assumed that there must have been some error 

 about Holway's procedure. The name which he proposed evi- 

 dently belongs here in part and with Puccinia Grossulariae in part. 



6. Puccinia urticata (Link.) comb. nov. 



Aecidium Urticae Schum. Enum. PI. Saell. 2:222. 1803. 

 ?Uredo Caricis Schum, Enum. PI. Saell. 2:231. 1803. 

 Caeoma Urticae Schlecht. Fl. Berol. 2: 112, 1824. 

 Caeoma urticatum Link, in Willd. Sp. PI. 6 2 : 62. 1825. 

 Puccinia Caricis Schroet. Krypt. — Fl. Schles. 3: 327. 1887. 



Not P. Caricis Reb. 1804. 

 Puccinia Urticae Lagerh. Mitt. Bad. Ver. 2 : 72. 1889. Not P. 



Urticae Barcl. 1887. 

 Dicaeoma Urticae Kuntze, Rev. Gen. 3 3 : 467. 1898. 

 Wicaeoma Caricis Kuntze, Rev. Gen. 3 3 : 468. 1898. 

 Puccinia Garrettii Arth. Bull. Torrey Club. 32:41. 1905. 



O & I. Pycnia and aecia on Urtica spp. (For cultures see 

 Bot. Gaz. 29:270, 1900, 35:16, 1903: Jour. Myc. 12: 15, 1906, 

 14:14, 1908, Mycologia 2:223, 1910, 4:17, 1912.) 



II. Urediniospores broadly ellipsoid, rather large, 18-25 X 24- 

 35 fx; wall golden-brown, 1.5-2^ thick, rather sparsely echinulate, 

 the pores 3, rarely 4, equatorial. 



III. Teliospores mostly clavate, 15-23 X 39-71 li, usually 

 rounded above, the upper cell much broader and shorter than the 



