471 
120. NIGREDO PLUMBARIA (Pk,) Arth. 
Uromyces gaurina (Pk.) Snyder. 
Caeomurus plumbarius (Pk.) Kuntze. 
Caeomurus gaurinus (Pk.) Arth. 
On Gaura biennis L. 1896:222. 1898:180. 1903:145. 
Hamilton, 1907 (Wilson); Tippecanoe, 1896 (Snyder). 
On Oenothera biennis L. 
Tippecanoe, 1912 (Orton). 
121. NIGREDO POLYGONI (Pers.) Arth. 
Uromyces polygoni (Pers.) Fuckel. 
Caeomurus Polygoni (Pers.) Kuntze. 
On Polygonum aviculare L. 1893:57. 1896:223. 1905:181. 
Franklin, 1912, 1914 (Ludwig, in Barth. N. Am. Ured. 1196); 
Hamilton, 1905 (Wilson); Kosciusko, 1909 (Funk): Montgom- 
ery, 1893 (Olive); Putnam, 1893 (Underwood); Tippecanoe, 
1888 (Bolley); 1896 (Snyder). 
On Polygonum erectum L. 1893:58. 
Boone, 1911 (Miller); Henry, 1915 (Jackson); Johnson, 1890 
(Fisher); Putnam, 1893 (Underwood Ind. Biol. Sur. 41); 
Tippecanoe, 1888 (Bolley); 1895 (Snyder). 
122. NIGREDO POLEMONII (Pk.) Arth. 
Aecidium Polemonii Pk. 
Uromyces acuminatus Arth. 
Caeomurus acuminatus (Arth.) Kuntze. 
I. On Polemonium reptans L. 
Tippecanoe, 1901 (Arthur). 
III. On Spartina Michauxiana Hitch. (S. cynosuroides (L.) Roth). 
1903:144. 1908:89. 
Jasper, 1903, 1915 (Arthur); Lake, 1913 (Arthur); Starke, 1905 
(Arthur); Steuben, 1903 (Kellerman). 
123. NIGREDO PROEMINENS (DC.) Arth. 
Uromyces Euphorbiae (Schw.) C. & P. 
Caeomurus Euphorbiae (Schw.) Kuntze. 
On Chamaesyce humistrata (Engelm.) Small (Huphorbia humis- 
trata Engelm.) 1903:144. 1905:180. 
