146 



Mycologia 



Am. Fungi jjo; Shear, N. Y. Fungi I2j; Sydow, Ured. 202^, 

 2414, 2516. 



Pnccinia Eleocharidis is the common 2-celled form on Eleo- 

 charis. It is the only species on this host which has been cultured. 

 For record of first cultures see Journal of Mycology 12 : 23. 1906. 

 It is interesting that the aecial distribution appears to be Hmited 

 to a portion of the area covered by the uredinial and tehal stages. 

 This situation is of course entirely possible but on the other hand 

 further collecting may alter the situation. The aecia on Eiipa- 

 toriHm are often not conspicuous and may have been overlooked 

 in the southern range of the species. 



9. Uromyces Eleocharidis Arthur, Bull. Torrey 

 Club 33 : 514. 1906 



Nigredo Eleocharidis Arth. N. Am. Flora 7 : 232. 1912. 

 O and 1. Pycnia and aecia unknown. 



II. Uredinia amphigenous, scattered, oblong, 0.3-1.5 mm. long, 

 tardily dehiscent by one or more longitudinal slits, dark cinnamon- 

 brown ; urediniospores ellipsoid to broadly ellipsoid, 15-19 by 

 19-29 /a; wall golden-yellow, thin, 1-1.5/x, sparsely and finely 

 echinulate, the pores 2, approximately equatorial. 



III. Telia amphigenous, thickly scattered, oblong, 0.5-2 mm. 

 or more long, tardily dehiscent by longitudinal slits, chocolate- 

 brown ; teliospores angularly obovoid, truncate or rounded above, 

 narrowed below, 16-22 by 27-45^; wall light chestnut-brown, 

 rather thin, 1-1.5/x, thicker above, y-iO}ji, smooth; pedicel tinted, 

 about once to once and a half length of spore. 



On Cyperaceae: 



Type locality : Aberdeen, South Dakota, on Eleocharis pahistris. 



Distribution : Northern Mississippi and Missouri basins. 



Exsiccati : D. GrifT., W. Am. Fungi 60, 60a; Barth, Fungi 

 Columb. 22^^, 3291 ; Sydow, Ured. 2102, 2252; Brenckle, Fungi 

 Dak. 50. 



Excluded Names 

 Pnccinia Romagnoliana Maire & Sacc. Ann. Myc. i : 220. 1903. 



According to the Sydow Monograph this species is near Pnc- 

 cinia Cyperi. It is even suggested that it may be only the Euro- 



