at* 



Cultures of Uredineae in 1916 and 1917 311 



I. Salt marshes of coast, Nova Scotia (III also in Delaware and 

 Florida), and Southern California (III not known on Pacific 



coast) Uromyces Spartinae Farl. 



Aeciospores 15-23 by 16-26 fi, on Polemoniaceae. 

 Teliosporei narrow and mostly acuminate above. 



I. Dry plains and thickets, Indiana and Wisconsin to North Dakota 

 and foothills of Colorado (III same). 



Uromyces acutninatus Arth. 

 Aeciospores 16-23 by 18-29 fi, on Primulaceae. 

 Teliospores mostly blunt or truncated above. 



I. Moist plains, Central Indiana to Central Wisconsin and foothills of 

 Colorado and Wyoming (III same). 



Uromyces Steironematis nom. nov. 

 Aeciospores 18-30 by 19-35 M. on Convallariaceae. 

 Teliospores generally blunt or acute. 



I. Lake or river banks, Buffalo, N. Y., to Central Montana and 

 Nebraska (III North Dakota) . .Uromyces magnatus comb. nov. 



The collection used for the initial culture may be taken as type 

 of U. Steironematis. It was collected at Palmer, Neb., March 

 22, 1905, on Spartina Michauxiana Hitchc, by Rev. J. M. Bates, 

 and was successfully sown May 26, 1905, on Steironema 

 cilidtum. 11 



The forms of the teliospores and the habitats of the four 

 forms are to be taken only as the general expression of the races, 

 and are of no real diagnostic value except as associated with other 

 characters. Both acuminate and rounded teliospores can usually 

 be found in the same sorus, but the impression given by a micro- 

 scopic mount from specimens of the first race is generally that 

 the spores are prevailingly rounded above, from the second race, 

 acuminate, etc. 



The aecia of U. Spartinae have been collected on Arenaria and 

 Tissa in Nova Scotia and southern California ; those of U. acutni- 

 natus on Collomia, Gilia, Phlox (three species) and Polcmonium, 

 in Colorado, Indiana, Iowa, Minnesota, Nebraska, North Dakota, 

 South Dakota and Wisconsin ; those of U. Steironematis on 

 Dodccathcon and Steironema, in Colorado, Illinois, Iowa, Kansas, 

 Nebraska, North Dakota, South Dakota, Wisconsin and Wyo- 

 ming; and those of U. magnatus on Polygonatum (two species) 

 and Vagnera (two species), in Illinois, Iowa, Minnesota, Mon- 

 tana, Nebraska, North Dakota, South Dakota and Wisconsin. 



17 Jour. Myc. 12: 25. 1906. 



