256 NORTH AMERICAN FLORA [V01.UME 7 



II. Uredinia hypophyllous, scattered, roundish, small, 0.2-0.3 mm. in diameter, soon 

 naked, somewhat pulverulent, pale cinnamon-brown, ruptured epidermis conspicuous ; 

 urediniospores broadly ellipsoid or globoid, 18-24 by 21-27 /i ; wall golden-brown, 1.5-2 /x 

 thick, finely and rather closely echinulate, the pores 3, equatorial. 



III. Telia hypophyllous, scattered, roundish, small, 0.2-0.3 mm. in diameter, soon 

 naked, somewhat pulverulent, chestnut-brown, ruptured epidermis noticeable ; teliospores 

 broadly ellipsoid or obovoid, 15-19 by 19-23 m ; wall cinnamon-brown, rather thick, 1.5-2 /x, 

 with a small hyaline papilla over the germ-pore, moderately and evenly verrucose ; pedicels 

 short, hyaline, deciduous. 



On Fab ace ae : 



Colutea arborescens 'L,., Kansas. 

 Type locality : Meran, Austria, on Colutea arborescens. 

 Distribution: Introduced in Kansas ; common in Europe. 

 Illustration : Bull. Torrey Club 37 : 575,/. 1, A. 



62. Nigredo Cologaniae Arthur. 



Uromyces Cologaniae Arth. Bot. Gaz. 39: 387. 1905. 



O and I. Pycnia and aecia unknown. 



II. Uredinia hypophyllous, scattered, round, small, 0.3 mm. or less across, soon 

 naked, pulverulent, pale, cinnamon -brown, ruptured epidermis barely noticeable ; uredinio- 

 spores globoid, 16-23 by 19-27 ju ; wall pale cinnamon-brown, thin, 1.5-2 ju, evenly and 

 minutely echinulate, the pores 3 or 4, equatorial. 



III. Telia hypophyllous, scattered, round, small, about 0.3 mm. across, soon naked, 

 pulverulent, cinnamon-brown, ruptured epidermis barely noticeable; teliospores oval or 



globoid, 16-20 by 18-26 ju, rounded at both ends; wall cinnamon-brown, 1.5-2 /x thick, 

 thicker at the apex, 2-4 )Lt, with a very low pale umbo, closely and finely verrucose; pedicel 



colorless, short, fragile, mostly deciduous. 



On Fabaceae : 



Cologania afflnis Mart. & Gal. , Veracruz. 



Cologania congesta Rose, Mexico (state). 



Cologania pule he lla H.B.K., Michoacan. 



Cologania sp. , Oaxaca. 



Teramnus uncinaius Sw., Porto Rico. 

 Type locality : Patzcuaro, Mexico, on Cologania pulchella. 

 Distribution : Central and southern Mexico, and in the West Indies. 



63. Nigredo Medicaginis (Pass.) Arthur. 



Uredo Fabae Medicaginis -fa Ic a tae DC. Fl. Fr. 6: 69, liyponym. 1815. 

 Uromyces Medicaginis Pass.; Thiira. Herb. Myc. Oecon. 156. 1874. 

 Uromyces Medicaginis falcatae Wint. in Rab. Krypt. Fl. li : 159. 1881. 

 Uredo medicaginicola Speg. Anal. Mus. Nac. Buenos Aires 6 : 234. 1898. 

 Nigredo Medicaginis -falcatae Arth. Result. Sci. Congr. Bot. Vienne 344. 1906. 



O and I. Pycnia and aecia uncertain. 



II. Uredinia chiefly hypophyllous, scattered, oval or roundish, 0.2-0.5 mm. across, 

 rather early naked, pulverulent, cinnamon-brown, ruptured epidermis conspicuous; uredini- 

 ospores broadly ellipsoid or subglobose, 16-20 by 18-23 m; wall golden-brown , 1.5-2ju thick, 

 finely and rather sparsely echinulate, the pores 3 or 4, equatorial. 



III. Telia chiefly hypophyllous, scattered, oval or roundish, 0.3-0.6 mm. across, rather 



early naked, somewhat pulverulent, dark cinnamon-brown, ruptured epidermis conspicuous ; 



teliospores subglobose or ovoid, 15-20 by 19-24 /i ; wall cinnamon-brown, rather thin, about 



1.5 IX, with a small papilla over the germ-pore, moderately verrucose with more or less 



elongate papillae arranged in evident longitudinal rows ; pedicel short, hyaline, deciduous. 

 Pycnia and aecia of the species unknown in America ; said to be on Euphorbia Cyparissias, E. 

 Gerardiana^ and E. virgaia in Europe. 



On Fabaceae : 



Medicago denticulata Willd., Louisiana. 



Medicago falcata L., South Dakota. 



Medicago hispida Gaertn., I,ouisiana. 



Medicago lupulina L., California, Delaware, Massachusetts, New York, North Carolina, 



Ohio, Oregon, West Virginia ; Ontario ; Mexico (state). 

 Medicago saliva L., Alabama, Arizona, Colorado, Indiana, Iowa, Kansas, lyouisiana, 



Nebraska, Ohio. South Dakota, Texas ; Coahuila. 

 Medicago tuberculata Willd. {M. confinis Koch), lyouisiana. 



