AMERICAN UREDINE^E. 185 



contents into star shaped forms. The scar made by the 

 separation of the pedicel can rarely be detected. The 

 germ-pores are also obscure. The collection on Andropo- 

 gon contains appears to differ from that on A. nuiano- 

 caipus, by having more truly elliptical and thicker- walled 

 telentospores, but there appears to be no specific distinc- 

 tion. ,The specimens of this distribution collected at 

 Guadalajara, Mex., are part of the type collection. 



41. Puccinia cenchri Diet . & Holw . (1897. Bot. Gaz. 

 24:28). 



41a. On Cenchrus multiflorus Presl. ii, III. Guadalajara, Mex., Hol- 

 way. 



Orig. Desc; "Sori very small, hypophyllous, scattered; uredosori 

 surrounded by the ruptured epidermis; spores obovate or elliptical, 

 36-45 by 30-35//, brown, echinulate, with equatorial germ-pores; 

 teleutosori covered by the epidermis, black; spores oblong-, mostly 

 clavate, apex truncate, or irregularly angled, sometimes constrict- 

 ed, narrowed or rounded at base, 40-53 by 18-25,", epispore smooth, 

 brown, strongly thickened at apex; pedicel very short, brown." 



The specimens in this distribution are part of the type 

 collection. This species has also been found on Cenchrus 

 cchinatns L,., E. Ule, Herbarium Brasiliense, No. 2549. 



42. Puccinia substriata Ell. & Barth. (1897. Erythea 



5:47). 



42a. On Paspalum setaceum Michx. II, III. Rooks Co., Kans., Bar- 

 tholomew. 



Mb. On Paspalum paniculatum E. II, Hi. Cuernavaca,Mex., Holway. 



42c. On Pennisetum mexicanum Hemsl. ii, III. Patzcuaro, Mex., 

 Holway. 



Aid. On Pennisetum mexicanum Hemsl. ii, III. Near Morelia, Mex., 

 Holway. 



Orig. Desc. "II & III. Amphigenous. Uredospores globose or obo- 

 vate, 19-23 by 22-30//, ferruginous, very faintly echinulate, in minute 

 (i/jMmm.) punctiform or elliptical sori, covered by the irregularly 

 ruptured epidermis. Teleutospores obovate or clavate, rusty 

 brown, distinctly constricted, upper cell mostly broader and very 



